feat: add list_pending_jobs and get_pending_job

spark_executor/tools/submit.py

@@ -124,3 +124,28 @@ def confirm_submit_job(*, pending_id: str) -> SubmitResult:
         application_id=application_id,
         tracking_url=tracking_url,
     )
+
+
+def list_pending_jobs() -> list[dict[str, object]]:
+    return [p.model_dump() for p in pending_store.list_all()]
+
+
+def get_pending_job(pending_id: str) -> dict[str, object]:
+    p = pending_store.get(pending_id)
+    if p is None:
+        raise KeyError(f"Unknown pending_id: {pending_id}")
+    return p.model_dump()
+
+
+def cancel_pending_job(pending_id: str) -> dict[str, str]:
+    p = pending_store.get(pending_id)
+    if p is None:
+        raise KeyError(f"Unknown pending_id: {pending_id}")
+    if p.status in ("SUBMITTED", "FAILED"):
+        raise ValueError(
+            f"pending_id {pending_id} is in status {p.status!r} and cannot be cancelled"
+        )
+    p.status = "CANCELLED"
+    pending_store.save(p)
+    logger.info(f"cancel_pending_job pending_id={pending_id}")
+    return {"pending_id": pending_id, "status": "CANCELLED"}