Fix TypeError in create_flat_index() and create_ivf_index():
- Line 678: dimension= → dimensions=
- Line 692: dimension= → dimensions=
The FAISSManager.__init__() expects 'dimensions' (plural), not 'dimension'.
This bug prevented using the factory functions to create FAISS indexes.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>