feat: add prgs-reconciler profile and gated already-landed PR close (Closes #310)

Introduce a dedicated reconciler role with gitea_reconcile_already_landed_pr,
which closes open PRs only after live fetch and ancestor proof against a fresh
target branch. Document the gitea-reconciler namespace and extend task routing.

tests/test_resolve_task_capability.py

@@ -275,6 +275,18 @@ class TestResolveTaskCapability(unittest.TestCase):
             self.assertEqual(res["required_role_kind"], "author")
             self.assertIn("author", res["exact_safe_next_action"].lower())
 
+    @patch("mcp_server.api_request", return_value={"login": "author-user"})
+    @patch("mcp_server.get_auth_header", return_value="token author-pass")
+    def test_resolve_reconcile_already_landed_pr_requires_close(self, _auth, _api):
+        with patch.dict(os.environ, self._env("author-profile")):
+            res = mcp_server.gitea_resolve_task_capability(
+                task="reconcile_already_landed_pr", remote="prgs"
+            )
+            self.assertEqual(res["requested_task"], "reconcile_already_landed_pr")
+            self.assertEqual(res["required_operation_permission"], "gitea.pr.close")
+            self.assertEqual(res["required_role_kind"], "reconciler")
+            self.assertFalse(res["allowed_in_current_session"])
+
     @patch("mcp_server.api_request", return_value={"login": "author-user"})
     @patch("mcp_server.get_auth_header", return_value="token author-pass")
     def test_close_pr_known_and_lookalike_tasks_still_fail_closed(self, _auth, _api):