Replaces the Ollama HTTP get_embedding with a fastembed.TextEmbedding
singleton loaded lazily on first call. Model: BAAI/bge-small-en-v1.5
(384-dim), cached to /data/fastembed-cache.
Public API unchanged:
- get_embedding(text, model=None) — `model` now silently ignored
- upsert_note_embedding
- semantic_search_notes
- backfill_note_embeddings
_cosine_similarity gains a defensive length-mismatch check so any
stale 768-dim row that survived the migration is treated as 0.0
similarity rather than crashing zip().
The Ollama client dep stays in pyproject for now (other services still
use it); Phase 7 removes it once chat/journal/curator are gone.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
