[CI] Keep Track of Workflow Name Instead of Job Name

The metrics script includes some logic to only read look at workflows up
to the most recent workflow it has seen previously. This was broken in a
previous patch when workflow metrics began to be emitted per job. The
logic ending the metrics gathering would never trigger, so we would
continually fetch more and more workflows until OOM.

.ci/metrics/metrics.py

@@ -24,6 +24,7 @@ class JobMetrics:
     status: int
     created_at_ns: int
     workflow_id: int
+    workflow_name: str
 
 
 @dataclass
@@ -199,6 +200,7 @@ def get_per_workflow_metrics(
                     job_result,
                     created_at_ns,
                     workflow_run.id,
+                    workflow_run.name,
                 )
             )
 
@@ -278,7 +280,7 @@ def main():
         for workflow_metric in reversed(current_metrics):
             if isinstance(workflow_metric, JobMetrics):
                 workflows_to_track[
-                    workflow_metric.job_name
+                    workflow_metric.workflow_name
                 ] = workflow_metric.workflow_id
 
         time.sleep(SCRAPE_INTERVAL_SECONDS)