fix: N+1 query pattern in event trigger loop (routine_engine) (#1163)

* fix: N+1 query pattern in event trigger loop (routine_engine)

* fix: linter

src/db/mod.rs

@@ -387,6 +387,10 @@ pub trait RoutineStore: Send + Sync {
         limit: i64,
     ) -> Result<Vec<RoutineRun>, DatabaseError>;
     async fn count_running_routine_runs(&self, routine_id: Uuid) -> Result<i64, DatabaseError>;
+    async fn count_running_routine_runs_batch(
+        &self,
+        routine_ids: &[Uuid],
+    ) -> Result<HashMap<Uuid, i64>, DatabaseError>;
     async fn link_routine_run_to_job(
         &self,
         run_id: Uuid,