fix(chat): classify CLI output surface

Author: maxliux5

loopx/control_plane/testing/cli_output_budget.py

@@ -597,6 +597,12 @@ class CliOutputCommandClassification:
         surface_id=None,
         rationale="explicit provider setup, sync, doctor, and gate-notification command family",
     ),
+    CliOutputCommandClassification(
+        command_id="chat",
+        qualification="explicit_cold_path_exception",
+        surface_id=None,
+        rationale="explicit loopback Goal Studio server launched on demand",
+    ),
     CliOutputCommandClassification(
         command_id="evidence-log",
         qualification="qualified_default",