- Create new migration 0001_add_model_version_to_cache.sql to add model_version column to text_analysis_cache table (default 'v1')
- Add composite index on source + model_version for efficient cache lookups
- Improve git branch detection in textCacheStore.ts:
* Check CACHE_MODEL_VERSION env var first (required in Docker)
* Suppress stderr with stdio pipes to eliminate spurious warnings
* Log ERROR (not warning) when git unavailable AND no env var set
* Only fall back to 'v1' as last resort, preventing silent dummy usage
- Remove unused imports (logModelVersionChange, logCacheInvalidation) and previousVersion variable
- Fixes repeated 'column model_version does not exist' errors on bot startup
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
