feat: register work-issue task routing for role-aware MCP (#139)

- Map work_issue/work-issue to author role and gitea.pr.create in resolver
- Route work-issue sessions through role_session_router before mutations
- Expose work_issue in runtime context task capabilities
- Add work-issue workflow source verifier and canonical routing docs
- Tests for resolver, router, and final-report verifier

Closes #139

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

gitea_mcp_server.py

@@ -4706,6 +4706,7 @@ _RUNTIME_CAPABILITY_TASKS = (
     "create_issue",
     "comment_issue",
     "create_pr",
+    "work_issue",
     "review_pr",
     "merge_pr",
     "close_issue",
@@ -4757,6 +4758,7 @@ def _build_runtime_task_capabilities(
         "create_issue": "can_create_issues",
         "comment_issue": "can_comment_on_issues",
         "create_pr": "can_author_prs",
+        "work_issue": "can_work_issues",
         "review_pr": "can_review_prs",
         "merge_pr": "can_merge_prs",
         "close_issue": "can_close_issues",