fix: resolve CI/CD type errors and workflow issues

src/core/review_engine.py

@@ -192,7 +192,7 @@ class ReviewEngine:
 
         return result
 
-    def _parse_text_response(self, response_text: str, files: list[FileChange]) -> list[Issue]:
+    def _parse_text_response(self, response_text: str, files: list[FileChange]) -> list[Issue]:  # noqa: ARG002
         issues = []
         lines = response_text.split("\n")
 
@@ -330,12 +330,14 @@ class ReviewEngine:
             if not file_change.diff.strip():
                 continue
 
-            file_language = language or self.repo.get_file_language(file_change.filename)
+            file_language = language
+            if not file_language and self.repo:
+                file_language = self.repo.get_file_language(file_change.filename)
 
             prompt = ReviewPromptTemplates.get_prompt(
                 diff=file_change.diff,
                 strictness=strictness,
-                language=file_language
+                language=file_language or ""
             )
 
             try: