Add Title and Assignee fields to MutationEvent struct so activity feeds
can display meaningful context without extra lookups. Updated emitMutation
signature to accept these values and modified all callers:
- Create: passes issue.Title and issue.Assignee directly
- Update/Close: moved emitMutation after GetIssue to access enriched data
- Delete: uses existing issue lookup before deletion
- Dep/Label/Comment ops: passes empty strings (would require extra lookup)
Fixes bd-gqxd
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
3405f0c684