refactor: move git operations into seperate files

backend/app/git/operations/pull.py

@@ -0,0 +1,15 @@
+# git/operations/pull.py
+
+import git
+import logging
+
+logger = logging.getLogger(__name__)
+
+def pull_branch(repo_path, branch_name):
+    try:
+        repo = git.Repo(repo_path)
+        repo.git.pull('origin', branch_name)
+        return True, f"Successfully pulled changes for branch {branch_name}."
+    except Exception as e:
+        logger.error(f"Error pulling branch: {str(e)}", exc_info=True)
+        return False, f"Error pulling branch: {str(e)}"