kin: auto-commit after pipeline

core/watchdog.py

@@ -51,6 +51,25 @@ def _check_dead_pipelines(db_path: Path) -> None:
                     except Exception as upd_exc:
                         _logger.error("Watchdog: failed to update pipeline/task: %s", upd_exc)
                 # else: PermissionError (EACCES) — process exists but we can't signal it, skip
+
+        # Cleanup stale pipelines with no PID (zombie entries)
+        try:
+            stale = conn.execute(
+                "SELECT id, task_id FROM pipelines WHERE status = 'running' AND pid IS NULL "
+                "AND created_at < datetime('now', '-2 hours')"
+            ).fetchall()
+            for row in stale:
+                _logger.warning(
+                    "Watchdog: stale pipeline %s (no PID) — marking failed (%s)",
+                    row["id"], row["task_id"],
+                )
+                models.update_pipeline(conn, row["id"], status="failed")
+                models.update_task(
+                    conn, row["task_id"], status="blocked",
+                    blocked_reason="Stale pipeline (no PID recorded)",
+                )
+        except Exception as stale_exc:
+            _logger.error("Watchdog: stale cleanup failed: %s", stale_exc)
     except Exception as exc:
         _logger.error("Watchdog pass failed: %s", exc)
     finally: