Add org-level custom issue status definitions that appear in the issue
sidebar. Each status has a name, color, description, and an optional
"closes issue" flag that automatically closes/reopens the issue when
the status is selected.
Includes:
- IssueStatusDef model with CRUD operations
- Migration v346 adding issue_status_def table + status_id on issues
- Org settings UI for managing statuses
- Issue sidebar dropdown for selecting status
- Auto close/reopen when status has closes_issue flag
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>