batch-50: Step 3-4 source download from Guangzhou — 49/50 ok

Run on dev1 (Guangzhou) for the latency advantage. Walltime 3:41 vs
Singapore-estimated 1-2h (~30x speedup, mostly from image.lceda.cn
RTT going from 263ms to 2.6ms).

Pro 25:  24 ok + 1 fail (Super Dial 7f7565ef11 — Pro 2.x legacy
                          schematic/lists 401, separate cookie-perm issue)
         611 docs, 31 MB total
Std 25:  25 ok, 97 docs, 74 MB total
Combined: 49/50 success, 708 docs, 105 MB new disk usage

--max-source-mb 200 cap was not tripped; the 25 Pro candidates are all
under 10 MB, so the 481 MB X86-board outlier from the original sample
was not representative.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

data/raw/oshwhub/f643591fd411467db1e4efe3ce0970e8/metadata.json

@@ -64,5 +64,58 @@
     "public": true,
     "publish": true,
     "skipped_files": []
-  }
+  },
+  "source_format": "easyeda-std",
+  "source_path": "source/",
+  "source_documents": [
+    {
+      "doc_uuid": "a51017e584634cb9a6cfc16b809e2c38",
+      "docType": 1,
+      "master": "f6771b19a5f84bd0ace108816d41a153",
+      "path": "source/a51017e584634cb9a6cfc16b809e2c38.json",
+      "size": 513433,
+      "sha256": "0eb344b33f54c254006d60a26824281fbfe9c4c6d0951f346cd21bc21f55daf4"
+    },
+    {
+      "doc_uuid": "f57aba625b7e456ab3fb93ca6b18acb4",
+      "docType": 1,
+      "master": "4cc052833fb144f892820d36d38dc665",
+      "path": "source/f57aba625b7e456ab3fb93ca6b18acb4.json",
+      "size": 513433,
+      "sha256": "0eb344b33f54c254006d60a26824281fbfe9c4c6d0951f346cd21bc21f55daf4"
+    },
+    {
+      "doc_uuid": "9a6a565f2b924bae979845195f84ecba",
+      "docType": 1,
+      "master": "1a8ec35b4aee40759fbf13bfb5238461",
+      "path": "source/9a6a565f2b924bae979845195f84ecba.json",
+      "size": 513433,
+      "sha256": "0eb344b33f54c254006d60a26824281fbfe9c4c6d0951f346cd21bc21f55daf4"
+    },
+    {
+      "doc_uuid": "52b050addf3f44ccb5c2f63bd56dccf4",
+      "docType": 1,
+      "master": "4bb97540e70e41d69228d2b9853f5e94",
+      "path": "source/52b050addf3f44ccb5c2f63bd56dccf4.json",
+      "size": 513433,
+      "sha256": "0eb344b33f54c254006d60a26824281fbfe9c4c6d0951f346cd21bc21f55daf4"
+    },
+    {
+      "doc_uuid": "7a5660014c834672a8c1ead1ef48a865",
+      "docType": 1,
+      "master": "49085aefbecb409ca5d550e82322e8f7",
+      "path": "source/7a5660014c834672a8c1ead1ef48a865.json",
+      "size": 513433,
+      "sha256": "0eb344b33f54c254006d60a26824281fbfe9c4c6d0951f346cd21bc21f55daf4"
+    },
+    {
+      "doc_uuid": "1a0009a1b97844c096b4b7c4fedc83c2",
+      "docType": 3,
+      "master": "a84bfb7c0f3545a780a4cd715a6f221b",
+      "path": "source/1a0009a1b97844c096b4b7c4fedc83c2.json",
+      "size": 1890869,
+      "sha256": "438fd5c0da5352e946fe39a8de4af26562c53bf0c5e48447577398de7d0e3595"
+    }
+  ],
+  "editor_version": "6.5.15"
 }