fix(commandcode): accept base_url kwarg in fetch_models overrides

The model picker's generic live-fetch path (hermes_cli/models.py
provider_model_ids) calls profile.fetch_models(api_key=..., base_url=...).
Both CommandCode overrides only accepted api_key/timeout, so every picker
open raised TypeError, which was silently swallowed, leaving the provider
with zero models.

Match the base ProviderProfile.fetch_models signature (base_url kwarg) and
add a regression test asserting both profiles accept it.

plugins/model-providers/commandcode/__init__.py

@@ -79,6 +79,7 @@ class CommandCodeProfile(ProviderProfile):
         self,
         *,
         api_key: str | None = None,
+        base_url: str | None = None,
         timeout: float = 8.0,
     ) -> list[str] | None:
         """Fetch from the public CommandCode /models endpoint."""
@@ -126,6 +127,7 @@ class CommandCodeAnthropicProfile(ProviderProfile):
         self,
         *,
         api_key: str | None = None,
+        base_url: str | None = None,
         timeout: float = 8.0,
     ) -> list[str] | None:
         """Fetch from the public CommandCode /models endpoint.