Automate script checksum handling

scripts/update_checksum.py

@@ -7,7 +7,7 @@ SRC_DIR = PROJECT_ROOT / "src"
 if str(SRC_DIR) not in sys.path:
     sys.path.insert(0, str(SRC_DIR))
 
-from utils.checksum import calculate_checksum
+from utils.checksum import update_checksum_file
 from constants import SCRIPT_CHECKSUM_FILE, initialize_app
 
 
@@ -15,11 +15,8 @@ def main() -> None:
     """Calculate checksum for the main script and write it to SCRIPT_CHECKSUM_FILE."""
     initialize_app()
     script_path = SRC_DIR / "password_manager" / "manager.py"
-    checksum = calculate_checksum(str(script_path))
-    if checksum is None:
-        raise SystemExit(f"Failed to calculate checksum for {script_path}")
-
-    SCRIPT_CHECKSUM_FILE.write_text(checksum)
+    if not update_checksum_file(str(script_path), str(SCRIPT_CHECKSUM_FILE)):
+        raise SystemExit(f"Failed to update checksum for {script_path}")
     print(f"Updated checksum written to {SCRIPT_CHECKSUM_FILE}")