Add debug logging for DB path on startup

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/content_engine/models/database.py

@@ -178,13 +178,17 @@ class TrainingJob(Base):
 
 # --- Engine / Session factories ---
 
-# Ensure database directories exist
+# Ensure database directories exist (critical for HF Spaces first run)
+import logging as _logging
 from pathlib import Path as _Path
-_db_path = settings.database.url.replace("sqlite+aiosqlite:///", "")
-_Path(_db_path).parent.mkdir(parents=True, exist_ok=True)
+_db_url = settings.database.url
+_db_path = _db_url.replace("sqlite+aiosqlite:///", "")
+_db_dir = _Path(_db_path).parent
+_db_dir.mkdir(parents=True, exist_ok=True)
+_logging.getLogger(__name__).info("DB path: %s (dir exists: %s)", _db_path, _db_dir.exists())
 
 _catalog_engine = create_async_engine(
-    settings.database.url,
+    _db_url,
     echo=False,
     connect_args={"check_same_thread": False},  # SQLite specific
 )