- Change CreateIssueOption fields from *int64 (optional) to int64
- API auto-assigns org defaults when value is 0
- MCP gitea_issue_create now requires status_id, priority_id, type_id
(pass 0 for org default)
- Keep optional on gitea_issue_update (partial updates)
Co-Authored-By: Moko Consulting <hello@mokoconsulting.tech>