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]>

role_session_router.py

@@ -72,6 +72,8 @@ AUTHOR_TASKS = frozenset({
     "comment_pr",
     "address_pr_change_requests",
     "delete_branch",
+    "work_issue",
+    "work-issue",
 })
 
 TASK_REQUIRED_ROLE = {
@@ -90,6 +92,8 @@ TASK_REQUIRED_ROLE = {
     "blind_pr_queue_review": "reviewer",
     "request_changes_pr": "reviewer",
     "approve_pr": "reviewer",
+    "work_issue": "author",
+    "work-issue": "author",
 }
 
 WRONG_ROLE_REVIEWER_MSG = (