fix(mcp): enforce role capability invariants (Closes #723)

task_capability_map.py

@@ -462,6 +462,44 @@ def preflight_task_matches(
         return False
     return resolved == mutation or (resolved, mutation) in _PREFLIGHT_TASK_TRANSITIONS
 
+
+# Tasks for which permission alone is insufficient: the active/configured
+# profile's declared role must also match the task role.  This is the complete
+# resolver set from master at the #723 reconstruction point, shared with
+# runtime reporting so those two authorities cannot drift again.
+ROLE_EXCLUSIVE_TASKS: frozenset[str] = frozenset(
+    {
+        "acquire_reviewer_pr_lease",
+        "gitea_acquire_reviewer_pr_lease",
+        "review_pr",
+        "approve_pr",
+        "request_changes_pr",
+        "blind_pr_queue_review",
+        "pr_queue_cleanup",
+        "pr-queue-cleanup",
+        "merge_pr",
+        "acquire_merger_pr_lease",
+        "gitea_acquire_merger_pr_lease",
+        "adopt_merger_pr_lease",
+        "gitea_adopt_merger_pr_lease",
+        "release_merger_pr_lease",
+        "gitea_release_merger_pr_lease",
+        "create_branch",
+        "push_branch",
+        "create_pr",
+        "commit_files",
+        "gitea_commit_files",
+        "address_pr_change_requests",
+        "update_pr_branch_by_merge",
+        "gitea_update_pr_branch_by_merge",
+        "delete_branch",
+        "cleanup_merged_pr_branch",
+        "reconciliation_cleanup",
+        "work_issue",
+        "work-issue",
+    }
+)
+
 # Issue-mutating MCP tools and their resolver task keys.
 ISSUE_MUTATION_TOOL_TASKS: dict[str, str] = {
     "gitea_create_issue": "create_issue",