Fix logging messages to use proper lazy evaluation

- Replace f-strings in logging calls with % formatting for lazy evaluation
- Prevents eager evaluation of expressions in logging statements
- Follows Python logging best practices for performance and error handling
- Maintains same informative error messages with proper logging patterns

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

Co-Authored-By: Claude <[email protected]>

Author: Zsailer

jupyterlab_git/git.py

@@ -228,10 +228,10 @@ def call_subprocess(
     except TimeoutError as e:
         # Handle our custom timeout errors
         code, output, error = -1, "", str(e)
-        get_logger().warning(f"Git command timed out: {cmdline} - {str(e)}")
+        get_logger().warning("Git command timed out: %s - %s", cmdline, str(e))
     except BaseException as e:
         code, output, error = -1, "", traceback.format_exc()
-        get_logger().warning(f"Failed to execute git command: {cmdline}", exc_info=True)
+        get_logger().warning("Failed to execute git command: %s", cmdline, exc_info=True)
     finally:
         execution_lock.release()
 
@@ -272,9 +272,9 @@ def _cleanup_processes(self):
                     except subprocess.TimeoutExpired:
                         self._GIT_CREDENTIAL_CACHE_DAEMON_PROCESS.kill()
                         self._GIT_CREDENTIAL_CACHE_DAEMON_PROCESS.wait()
-                    get_logger().debug(f"Git credential cache daemon process (PID: {self._GIT_CREDENTIAL_CACHE_DAEMON_PROCESS.pid}) cleaned up successfully")
+                    get_logger().debug("Git credential cache daemon process (PID: %s) cleaned up successfully", self._GIT_CREDENTIAL_CACHE_DAEMON_PROCESS.pid)
             except Exception as e:
-                get_logger().warning(f"Failed to cleanup credential cache daemon: {e}")
+                get_logger().warning("Failed to cleanup credential cache daemon: %s", e)
             finally:
                 self._GIT_CREDENTIAL_CACHE_DAEMON_PROCESS = None