fix: correct parameter order and type annotations in get_github_app_installation_token

## What

Fixed swapped parameter order in test_get_github_app_installation_token where
gh_app_private_key_bytes and gh_app_id were in the wrong positions. Updated type
annotations for gh_app_id and gh_app_installation_id from str to int | None to
match the actual types returned by get_int_env_var and passed by callers.

## Why

The test passed despite the swapped arguments because create_jwt_headers was
mocked, so the incorrect types were never exercised. The str type annotations
were inconsistent with auth_to_github (which already used int | None) and with
config.py where these values originate as int | None from get_int_env_var.

## Notes

- Added str() cast at the create_jwt_headers call site, matching the existing
  pattern in auth_to_github line 36

Signed-off-by: jmeridth <jmeridth@gmail.com>

Author: jmeridth

auth.py

@@ -51,24 +51,26 @@ def auth_to_github(
 
 def get_github_app_installation_token(
     ghe: str,
-    gh_app_id: str,
+    gh_app_id: int | None,
     gh_app_private_key_bytes: bytes,
-    gh_app_installation_id: str,
+    gh_app_installation_id: int | None,
 ) -> str | None:
     """
     Get a GitHub App Installation token.
     API: https://docs.github.com/en/apps/creating-github-apps/authenticating-with-a-github-app/authenticating-as-a-github-app-installation # noqa: E501
 
     Args:
         ghe (str): the GitHub Enterprise endpoint
-        gh_app_id (str): the GitHub App ID
+        gh_app_id (int | None): the GitHub App ID
         gh_app_private_key_bytes (bytes): the GitHub App Private Key
-        gh_app_installation_id (str): the GitHub App Installation ID
+        gh_app_installation_id (int | None): the GitHub App Installation ID
 
     Returns:
         str: the GitHub App token
     """
-    jwt_headers = github3.apps.create_jwt_headers(gh_app_private_key_bytes, gh_app_id)
+    jwt_headers = github3.apps.create_jwt_headers(
+        gh_app_private_key_bytes, str(gh_app_id)
+    )
     api_endpoint = f"{ghe}/api/v3" if ghe else "https://api.github.com"
     url = f"{api_endpoint}/app/installations/{gh_app_installation_id}/access_tokens"
 

test_auth.py

@@ -85,7 +85,7 @@ def test_get_github_app_installation_token(self, mock_post):
         mock_ghe = ""
 
         result = get_github_app_installation_token(
-            mock_ghe, b"gh_private_token", "gh_app_id", "gh_installation_id"
+            mock_ghe, "gh_app_id", b"gh_private_token", "gh_installation_id"
         )
 
         self.assertEqual(result, dummy_token)