sync errors

db.py

@@ -103,6 +103,13 @@ def is_zip_processed(remote_path: str) -> bool:
     return row is not None
 
 
+def get_all_processed_paths() -> set[str]:
+    """Return all processed remote paths as a set for fast bulk membership checks."""
+    with get_db() as conn:
+        rows = conn.execute("SELECT remote_path FROM processed_zips").fetchall()
+    return {row["remote_path"] for row in rows}
+
+
 def mark_zip_processed(remote_path: str, file_size: int, status: str, error_msg: str | None = None) -> None:
     with get_db() as conn:
         conn.execute(