Update to NT-only dataset with 9 Church Fathers

Add data directories to .gitignore

Add OT+NT embeddings for 12 Church Fathers (8,468 entries, 224MB)

Expand to include OT books and add Jerome, John Chrysostom, and Ambrose of Milan

Fix location_start/location_end validation error: convert to strings

Add Church Fathers commentary embeddings (BGE-large, 1532 entries, NT only)

Merge HF Space initial commit with local repository

initial commit

Initial commit: Church Fathers Commentary API