fix: fix indentation and add try/finally in digest startup

dev-api.py

@@ -57,6 +57,7 @@ def _strip_html(text: str | None) -> str | None:
 def _startup():
     """Ensure digest_queue table exists (dev-api may run against an existing DB)."""
     db = _get_db()
+    try:
         db.execute("""
             CREATE TABLE IF NOT EXISTS digest_queue (
               id             INTEGER PRIMARY KEY,
@@ -66,6 +67,7 @@ def _startup():
             )
         """)
         db.commit()
+    finally:
         db.close()