Include firstSeen in error event webhook payload #111641
Description
Summary
The firstSeen timestamp is currently available on the issue-level webhook payload but is absent from the error event payload. Teams building error webhook pipelines need firstSeen at the event level to determine whether an error is new without a secondary issue lookup.
Current behavior
The issue webhook payload exposes firstSeen, but individual error event webhook payloads do not include this field.
Gap
Consumers of the error event webhook cannot tell at a glance whether this is the first occurrence of the issue. Correlating firstSeen requires a separate API call to the issue endpoint, adding latency and complexity to downstream pipelines.
Recommendation
Add firstSeen (and optionally lastSeen) from the parent issue to the error event webhook payload, mirroring what is already available on the issue webhook payload.
Action taken on behalf of Michael Chai.