fix: replace hardcoded Windows path with cross-platform tempdir

app/core/config.py

@@ -1,3 +1,5 @@
+import tempfile
+import os
 from pydantic_settings import BaseSettings
 from pydantic import ConfigDict
 from functools import lru_cache
@@ -16,7 +18,7 @@ class Settings(BaseSettings):
     log_level: str = "info"
 
     # Repository
-    repo_clone_dir: str = "C:/Users/KIIT/AppData/Local/Temp/repositories"  # nosec B108
+    repo_clone_dir: str = os.path.join(tempfile.gettempdir(), "ai-code-review-repos")  # nosec B108
     max_repo_size_mb: int = 500