45e6ec32ec
New memory/database.py with memory_meta table (path, category, size_bytes, modified, summary, keywords, embedding BLOB reserved for Stage 8) and memory_fts virtual table for full-text search. Public API: init_db, upsert, remove, search, list_all, migrate_from_files. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>