Update progress: chunk 1 completed

progress.json

@@ -0,0 +1,12 @@
+{
+  "completed_chunks": [
+    1
+  ],
+  "total_records": 748590,
+  "last_updated": "2025-10-25T06:34:09.635948",
+  "chunk_1": {
+    "start_idx": 0,
+    "end_idx": 100000,
+    "processed_at": "2025-10-25T06:34:09.635957"
+  }
+}