Replace ffprobe-static with ffmpeg-static for metadata extraction in
migration scripts. This removes the requirement for ffprobe binaries
across Docker, CI, and Vercel environments, simplifying the dependency
graph.
Implement AbortController in ConfigContext, PDFContext, and preference sync to prevent race conditions during session changes or rapid navigation. Refactor document preview routes into shared utilities and add LRU caching for text previews to optimize memory. Update documentation for Better Auth schema ownership and migration workflows. Fix issues with Postgres system user seeding and better-sqlite3 configuration.
