fix: include pipeline_slug in MinimalJobSerializer (#1148)

* fix: include pipeline_slug in MinimalJobSerializer (ids_only response)

The ADC worker fetches jobs with ids_only=1 and expects pipeline_slug in
the response to know which pipeline to run. Without it, Pydantic
validation fails and the worker skips the job.

Co-Authored-By: Claude <noreply@anthropic.com>

* Update ami/jobs/serializers.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 3 people

ami/jobs/serializers.py

@@ -158,7 +158,8 @@ class Meta(JobListSerializer.Meta):
 class MinimalJobSerializer(DefaultSerializer):
     """Minimal serializer returning only essential job fields."""
 
+    pipeline_slug = serializers.CharField(source="pipeline.slug", read_only=True, allow_null=True)
+
     class Meta:
         model = Job
-        # Add other fields when needed, e.g:  "name", "status", "created_at"
-        fields = ["id"]
+        fields = ["id", "pipeline_slug"]