fix(test): Mock os.chmod and _verify_binary_commit in test_start_test

The test was failing because os.chmod was called on a non-existent
file path and _verify_binary_commit would try to execute the binary.
Added mocks for both to make the test work with the new binary
verification code.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: cfsmp3

tests/test_ci/test_controllers.py

@@ -209,7 +209,10 @@ def test_cron_job_testing_true(self, mock_gcp_instance, mock_get_compute_service
     @mock.patch('mod_ci.controllers.g')
     @mock.patch('mod_ci.controllers.TestProgress')
     @mock.patch('mod_ci.controllers.GcpInstance')
-    def test_start_test(self, mock_gcp_instance, mock_test_progress, mock_g, mock_open_file,
+    @mock.patch('mod_ci.controllers._verify_binary_commit')
+    @mock.patch('os.chmod')
+    def test_start_test(self, mock_chmod, mock_verify_binary_commit, mock_gcp_instance,
+                        mock_test_progress, mock_g, mock_open_file,
                         mock_create_instance, mock_wait_for_operation):
         """Test start_test function."""
         import zipfile
@@ -252,6 +255,9 @@ def extractall(*args, **kwargs):
         g.db.add(customized_test)
         g.db.commit()
 
+        # Mock binary verification to succeed
+        mock_verify_binary_commit.return_value = (True, "Binary commit verified")
+
         # Test when gcp create instance fails
         mock_wait_for_operation.return_value = 'error occurred'
         start_test(mock.ANY, self.app, mock_g.db, repository, test, mock.ANY)