Wangamber/update transcription service folder

[amber-yujueWang]

Description

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All SDK Contribution checklist:

• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

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• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

[Copilot]

Pull request overview

This PR moves/establishes the azure-ai-transcription package under a new sdk/transcription/ service directory, updates CI wiring to build/test it from the new location, and adds/updates samples + test scaffolding for the transcription client.

Changes:

• Add a new sdk/transcription/ CI pipeline and update the package test pipeline to use ServiceDirectory: transcription.
• Add the azure-ai-transcription package content (client, models, ops patches, samples, tests, packaging metadata) under sdk/transcription/azure-ai-transcription/.
• Remove the old azure-ai-transcription CI/artifact wiring and asset tag file from sdk/cognitiveservices/.

Reviewed changes

Copilot reviewed 6 out of 78 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
sdk/transcription/ci.yml	New service-directory CI pipeline for transcription.
sdk/transcription/azure-ai-transcription/tsp-location.yaml	TypeSpec spec pin for SDK generation source.
sdk/transcription/azure-ai-transcription/tests/test_transcription_url_async.py	Async URL transcription test coverage.
sdk/transcription/azure-ai-transcription/tests/test_transcription_url.py	Sync URL transcription test coverage.
sdk/transcription/azure-ai-transcription/tests/test_transcription_options_async.py	Async options (profanity/phrase list/locales) tests.
sdk/transcription/azure-ai-transcription/tests/test_transcription_options.py	Sync options (profanity/phrase list/locales) tests.
sdk/transcription/azure-ai-transcription/tests/test_transcription_file_async.py	Async file upload transcription test (skips if asset missing).
sdk/transcription/azure-ai-transcription/tests/test_transcription_file.py	Sync file upload transcription test (skips if asset missing).
sdk/transcription/azure-ai-transcription/tests/test_transcription_enhanced_mode.py	Enhanced mode test coverage.
sdk/transcription/azure-ai-transcription/tests/test_transcription_diarization_async.py	Async diarization test coverage.
sdk/transcription/azure-ai-transcription/tests/test_transcription_diarization.py	Sync diarization test coverage.
sdk/transcription/azure-ai-transcription/tests/test_transcription_client_management_async.py	Async client lifecycle tests.
sdk/transcription/azure-ai-transcription/tests/test_transcription_client_management.py	Sync client lifecycle tests.
sdk/transcription/azure-ai-transcription/tests/test_transcription_basic_async.py	Async basic transcription tests.
sdk/transcription/azure-ai-transcription/tests/test_transcription_basic.py	Sync basic transcription tests.
sdk/transcription/azure-ai-transcription/tests/preparer.py	Test base + EnvironmentVariableLoader-based preparer.
sdk/transcription/azure-ai-transcription/tests/conftest.py	Test proxy startup + sanitizers/matcher configuration.
sdk/transcription/azure-ai-transcription/tests/.env.template	Template env vars for local test runs.
sdk/transcription/azure-ai-transcription/tests.yml	Pipeline config for running package tests in CI.
sdk/transcription/azure-ai-transcription/samples/sample_transcribe_with_profanity_filter.py	Sync sample: profanity filtering.
sdk/transcription/azure-ai-transcription/samples/sample_transcribe_with_phrase_list.py	Sync sample: phrase list biasing.
sdk/transcription/azure-ai-transcription/samples/sample_transcribe_with_enhanced_mode.py	Sync sample: enhanced mode + translate + prompts + diarization.
sdk/transcription/azure-ai-transcription/samples/sample_transcribe_with_diarization.py	Sync sample: diarization.
sdk/transcription/azure-ai-transcription/samples/sample_transcribe_multiple_languages.py	Sync sample: multilingual transcription.
sdk/transcription/azure-ai-transcription/samples/sample_transcribe_from_url.py	Sync sample: URL transcription.
sdk/transcription/azure-ai-transcription/samples/sample_transcribe_audio_file.py	Sync sample: file transcription.
sdk/transcription/azure-ai-transcription/samples/async_samples/sample_transcribe_with_profanity_filter_async.py	Async sample: profanity filtering.
sdk/transcription/azure-ai-transcription/samples/async_samples/sample_transcribe_with_phrase_list_async.py	Async sample: phrase list biasing.
sdk/transcription/azure-ai-transcription/samples/async_samples/sample_transcribe_with_enhanced_mode_async.py	Async sample: enhanced mode suite.
sdk/transcription/azure-ai-transcription/samples/async_samples/sample_transcribe_with_diarization_async.py	Async sample: diarization.
sdk/transcription/azure-ai-transcription/samples/async_samples/sample_transcribe_multiple_languages_async.py	Async sample: multilingual transcription.
sdk/transcription/azure-ai-transcription/samples/async_samples/sample_transcribe_from_url_async.py	Async sample: URL transcription.
sdk/transcription/azure-ai-transcription/samples/async_samples/sample_transcribe_audio_file_async.py	Async sample: file transcription.
sdk/transcription/azure-ai-transcription/samples/assets/sample-whatstheweatherlike-en.mp3	Sample audio asset for enhanced-mode samples.
sdk/transcription/azure-ai-transcription/samples/README.md	Update sample links to new sdk/transcription/... paths.
sdk/transcription/azure-ai-transcription/pyproject.toml	Package metadata/build configuration.
sdk/transcription/azure-ai-transcription/dev_requirements.txt	Dev dependencies for local development.
sdk/transcription/azure-ai-transcription/cspell.json	Spellchecker configuration for package terms.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/py.typed	PEP 561 typing marker.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/models/_patch.py	Custom model patch (EnhancedMode enabled serialization).
sdk/transcription/azure-ai-transcription/azure/ai/transcription/models/_models.py	Generated models for requests/responses/options.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/models/_enums.py	Generated enums (e.g., profanity filter mode).
sdk/transcription/azure-ai-transcription/azure/ai/transcription/models/init.py	Models package exports + patch hook.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/aio/_patch.py	Async package patch hook.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/aio/_operations/_patch.py	Async ops patch (adds transcribe_from_url).
sdk/transcription/azure-ai-transcription/azure/ai/transcription/aio/_operations/_operations.py	Generated async operations implementation.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/aio/_operations/init.py	Async operations exports + patch hook.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/aio/_configuration.py	Generated async client configuration/policies.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/aio/_client.py	Generated async client.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/aio/init.py	Async client exports + patch hook.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/_version.py	Package version constant.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/_utils/utils.py	Multipart helpers + internal typing utilities.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/_utils/model_base.py	Generated model base + serialization/deserialization.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/_utils/init.py	Utils package marker.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/_patch.py	Sync package patch hook.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/_operations/_patch.py	Sync ops patch (adds transcribe_from_url).
sdk/transcription/azure-ai-transcription/azure/ai/transcription/_operations/_operations.py	Generated sync operations + request builder.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/_operations/init.py	Sync operations exports + patch hook.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/_configuration.py	Generated sync client configuration/policies.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/_client.py	Generated sync client.
sdk/transcription/azure-ai-transcription/azure/ai/transcription/init.py	Sync client exports + __version__.
sdk/transcription/azure-ai-transcription/azure/ai/init.py	Namespace package marker.
sdk/transcription/azure-ai-transcription/azure/init.py	Namespace package marker.
sdk/transcription/azure-ai-transcription/assets.json	Test-proxy assets tag moved under transcription.
sdk/transcription/azure-ai-transcription/apiview-properties.json	APIView cross-language mappings.
sdk/transcription/azure-ai-transcription/_metadata.json	Codegen metadata (apiVersion).
sdk/transcription/azure-ai-transcription/README.md	Main package README link updates for new folder.
sdk/transcription/azure-ai-transcription/MANIFEST.in	Source distribution include rules.
sdk/transcription/azure-ai-transcription/LICENSE	Package license file.
sdk/transcription/azure-ai-transcription/CHANGELOG.md	Changelog in new folder; version 1.0.0b4 placeholder.
sdk/transcription/azure-ai-transcription/.gitignore	Package-local ignores (env, recordings, build artifacts).
sdk/cognitiveservices/ci.yml	Remove azure-ai-transcription artifact from old service directory CI.
sdk/cognitiveservices/azure-ai-transcription/assets.json	Remove old assets tag file from prior location.