Fix mypy errors

Author: mujacica

src/sentry/integrations/perforce/integration.py

@@ -94,7 +94,7 @@ def __init__(
 
     def get_client(self) -> PerforceClient:
         """Get the Perforce client instance."""
-        pass
+        raise NotImplementedError
 
     def on_create_or_update_comment_error(self, api_error: ApiError, metrics_base: str) -> bool:
         """
@@ -253,7 +253,7 @@ def build_integration(self, state: Mapping[str, Any]) -> IntegrationData:
         Returns:
             Integration data dictionary
         """
-        return {}
+        return {"external_id": ""}
 
     def post_install(
         self,

src/sentry/integrations/perforce/repository.py

@@ -48,7 +48,7 @@ def build_repository_config(
         Returns:
             Repository configuration
         """
-        return {}
+        raise NotImplementedError
 
     def compare_commits(
         self, repo: Repository, start_sha: str | None, end_sha: str