P6: non-neural query expansion (DSP recall lever, INV-1 preserved)
P5: auto re-ingest watcher (content-hash, watchdog/polling)
P4: snapshot persistence (atomic JSON, provider-agnostic restore)
P3: embedding provider abstraction (DSP/Ollama swappable)
P2: configurable rate limits (env-driven, defaults unchanged)
P1: search_confidence REST exposure (schema fix + provider path)
Obsidian Light Mode: vault-aware ingest with chunk/atom indexing
P0-1: removed _find_similar (live→file typo overcorrection eliminated)
P0-2: _exact_note_resolution on original_query (P6 expansion no longer suppresses exact_note_match)