feat(scip): auto-install indexers and generate compile_commands.json for C/C++

[jafreck]

Summary

Auto-install SCIP indexers and generate C/C++ compilation databases so users get rich code intelligence without manual setup.

Changes

SCIP indexer auto-install (src/scip/installer.ts)

• Bundle @sourcegraph/scip-typescript and @sourcegraph/scip-python as npm dependencies
• Auto-download scip-clang, scip-go, scip-ruby from GitHub releases to ~/.lore/bin/
• Fall back to pip/gem/dotnet/coursier for language-specific package managers
• Auto-install missing indexers during indexing on first use
• New lore install-scip CLI command for explicit installation

Registry resolution (src/scip/registry.ts)

• Check ~/.lore/bin/ (managed) and node_modules/.bin/ (npm-bundled) before system PATH
• Use resolvedPath (full path) instead of bare command name for execFile

C/C++ compilation database generation (src/scip/compdb.ts)

• Detect build systems: CMake, Meson, Make
• Auto-generate compile_c- Auto-generate compile_c- Auto-generate compile_c- Auto-generate compilete- Auto-ge-co- Auto-generate compile_c- Auto-generate compile_c- Auto-generate compile_c- Auto-generate compilete- Auto-ge-co- Auto-romScipSymbolt- Auto-generatecompile_c- Auto-generate compile_c- nd- Auto-generate compile_c- Auto-generate compile_c- Auto-generate compile_c- Autrecogniz- Auto-generate compile_c- Auto-generate compile_c- Auto-generate compile_c- Auto-generad- Auto-generate compile_c- Auto-generate compile_c- Auto-generate compile (- Auto-generate compile_c- Auto-generate compile_c- Auto-- Auto-generatecompile_c- Auto-generate `compile_c- Auto-gd

############################################End-to-end verified on PostgreSQL: lore index --root postgres --language c automatically detects############################################End-to-end verified on Postgre,527 SCIP-resolved call refs in ~37 seconds with zero manual setup

• parse_analyze_fixedparams callers now fully resolved: DefineView, pg_analyze_and_rewrite_fixedparams, post_parse_analyze_hook

Install status (lore install-scip)

Indexer	Method	Auto?
scip-typescript	npm dependency	✓
scip-python	npm dependency	✓
scip-clang	GitHub binary	✓
scip-go	GitHub tarball	✓
scip-ruby	GitHub binary	✓
scip-dotnet	dotnet tool	✓ (if .NET installed)
scip-java	coursier	manual
rust-analyzer	rustup	manual

[codecov]

Codecov Report

❌ Patch coverage is 73.30097% with 110 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.43%. Comparing base (6141936) to head (1c77945).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/scip/enrichment.ts	5.40%	35 Missing ⚠️
src/indexer/stages/scip-indexer.ts	74.54%	28 Missing ⚠️
src/scip/installer.ts	87.17%	20 Missing ⚠️
src/cli.ts	5.26%	18 Missing ⚠️
src/scip/compdb.ts	88.60%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #211      +/-   ##
==========================================
- Coverage   88.04%   87.43%   -0.61%     
==========================================
  Files          80       82       +2     
  Lines        9048     9429     +381     
  Branches     2798     2925     +127     
==========================================
+ Hits         7966     8244     +278     
- Misses       1082     1185     +103     

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