f18eb90324
- Added `is_implementation_authorizer` check requiring OWNER or allowlisted maintainer to authorize implementation work. - Blocked `gh_push_branch` and `gh_open_pr` for unclassified/enhancement/proposal issues without explicit directive authorization. - Auto-allowed bug and documentation issues without requiring a directive. - Propagated `authorizes_impl` flag through events, server, tasks, and worker bindings.