fix(backend): retrieve root_job for MiniPulledJob + fix root job for flow jobs (#6490)

* feat(backend): retrieve root_job for MiniPulledJob + fix root job for flow jobs

* nit

* nits

* set root_job only if additional information meaning if not equal to innermost or parent

* nit

* feat: add root job env var

* nits

* fix build

* nit

* fix build

* nit

* sqlx

backend/windmill-worker/src/python_executor.rs

@@ -2146,6 +2146,7 @@ pub async fn start_worker(
         None,
         None,
         None,
+        None,
     )
     .await
     .to_vec();
@@ -2266,6 +2267,7 @@ for line in sys.stdin:
         None,
         None,
         None,
+        None,
     )
     .await;