fix: bound task failures and release stalled workers

apps/admin_console/routers/tasks.py

@@ -202,7 +202,9 @@ async def run_task(request: RunRequest):
     # With no explicit serial the probe itself resolves a live target (it
     # prefers the diagnostics target preference, then any unlocked ready
     # device); the verified serial is bound below.
-    target_serial = request.device_serial
+    target_serial = (
+        request.runtime_overrides.device_serial if request.runtime_overrides else None
+    ) or request.device_serial
     device_probe = await readiness_engine.run_device_submission_probe(target_serial=target_serial)
     if device_probe and device_probe.summary in {"Device Locked", "Lock State Unknown"}:
         locked_serial = (
@@ -224,7 +226,7 @@ async def run_task(request: RunRequest):
         # Only auto-selected targets may be re-bound to the probed device. An
         # explicitly requested serial is never silently replaced -- if it is
         # invalid, enqueue_tasks rejects the submission with a clear error.
-        if verified_serial and not request.device_serial:
+        if verified_serial and not target_serial:
             target_serial = verified_serial
 
     response = await task_queue_service.enqueue_tasks(
@@ -240,6 +242,9 @@ async def run_task(request: RunRequest):
         ingress=request.ingress or "frontend",
         session_id=request.session_id,
         conversation_id=request.conversation_id,
+        runtime_overrides=request.runtime_overrides.model_dump(exclude_none=True)
+        if request.runtime_overrides
+        else None,
     )
 
     from apps.admin_console.services.automation_service import register_submission