Reorganizes the Search & Sync MVP plan into three independently
verifiable gates (A: Lexical MVP, B: Hybrid MVP, C: Sync MVP)
to reduce integration risk. Each gate has explicit deliverables,
acceptance criteria, and can ship on its own.
Expands the specification with additional detail on document
generation, search API surface, sync orchestration, and
integrity repair paths. Removes the outdated rename note since
the project is now fully migrated to gitlore/lore naming.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>