fix: dispatcher passe frames_dir (job dir) pas parent a pre_decimate

scripts/dispatcher.py

@@ -821,10 +821,10 @@ def _post_job_qc_sync(job_id: int, worker: dict, frames_dir: str):
         print(f"  post_job #{job_id}: worker={worker['host']} != ml-stack, skip QC sync", flush=True)
         return
     alias = ML_STACK_ALIAS
-    parent = str(Path(frames_dir).parent)
+    # frames_dir is already the job dir
     pre_cmd = (
         f"python3 {_PRE_DECIMATE} {job_id} "
-        f"--frames-dir {shlex.quote(parent)} "
+        f"--frames-dir {shlex.quote(frames_dir)} "
         f"> /tmp/pre_decimate_{job_id}.log 2>&1"
     )
     rc_pre, _, _ = ssh(alias, pre_cmd, timeout=600)