feat(ingest): budget de chunk chico para el rulebook (estrategia A)

feat(ingest): metadata por set y chunking fino del rulebook

feat(rag): ingest cards as a new corpus_chunks source_type

feat(corpus): add Unleashed Rules FAQ as corpus source v1.3.0

feat(rag): add @tag system and per-keyword chunks for precise retrieval

feat(rag): re-chunk rulebook by rule number for precise retrieval

fix: use uuid5 for chunk IDs to match Supabase uuid column type

feat: add ingest pipeline script (chunking + embeddings + pgvector upsert)