fix: guard db.close() in add_to_digest_queue with try/finally

dev-api.py

@@ -483,11 +483,11 @@ def list_digest_queue():
 @app.post("/api/digest-queue")
 def add_to_digest_queue(body: DigestQueueBody):
     db = _get_db()
+    try:
         exists = db.execute(
             "SELECT 1 FROM job_contacts WHERE id = ?", (body.job_contact_id,)
         ).fetchone()
         if not exists:
-        db.close()
             raise HTTPException(404, "job_contact_id not found")
         result = db.execute(
             "INSERT OR IGNORE INTO digest_queue (job_contact_id) VALUES (?)",
@@ -495,6 +495,7 @@ def add_to_digest_queue(body: DigestQueueBody):
         )
         db.commit()
         created = result.rowcount > 0
+    finally:
         db.close()
     return {"ok": True, "created": created}