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/d9c172442b774ab9bd740f730d5458d9/metadata.json

@@ -46,5 +46,74 @@
     "public": true,
     "publish": true,
     "skipped_files": []
-  }
+  },
+  "source_format": "easyeda-std",
+  "source_path": "source/",
+  "source_documents": [
+    {
+      "doc_uuid": "8e4c4fbd441148d1a4263a174924eb5c",
+      "docType": 1,
+      "master": "affe495791f14ffdb4247f268ce95c23",
+      "path": "source/8e4c4fbd441148d1a4263a174924eb5c.json",
+      "size": 539490,
+      "sha256": "559bda0f6eef0a422892dfc71e27d49d1e0881e364e355de9c7a5a3776395ae7"
+    },
+    {
+      "doc_uuid": "a4fd813bfd104b9cb6194c6517c422bd",
+      "docType": 1,
+      "master": "705a449764da4732b904fc3ed2bc19f0",
+      "path": "source/a4fd813bfd104b9cb6194c6517c422bd.json",
+      "size": 539490,
+      "sha256": "559bda0f6eef0a422892dfc71e27d49d1e0881e364e355de9c7a5a3776395ae7"
+    },
+    {
+      "doc_uuid": "4e32fccaef79492da5ac247d685cc0e1",
+      "docType": 1,
+      "master": "b7471d7bee0b444d853c62c1067bf786",
+      "path": "source/4e32fccaef79492da5ac247d685cc0e1.json",
+      "size": 539490,
+      "sha256": "559bda0f6eef0a422892dfc71e27d49d1e0881e364e355de9c7a5a3776395ae7"
+    },
+    {
+      "doc_uuid": "5cd05a0405874e02a704058fcdc84a4a",
+      "docType": 3,
+      "master": "cd803ffdbb864c53b12159b621cf4064",
+      "path": "source/5cd05a0405874e02a704058fcdc84a4a.json",
+      "size": 3938087,
+      "sha256": "12c2f30729773e3a8571da0f796edb205d1c3f0876303744e2d3e2991e4ffb30"
+    },
+    {
+      "doc_uuid": "6143db0e28994d55bf223074ca19242d",
+      "docType": 1,
+      "master": "d174b92ddb8e45c2a2b6125460ac0d7d",
+      "path": "source/6143db0e28994d55bf223074ca19242d.json",
+      "size": 539490,
+      "sha256": "559bda0f6eef0a422892dfc71e27d49d1e0881e364e355de9c7a5a3776395ae7"
+    },
+    {
+      "doc_uuid": "f97d8f1964ae4cf7962d6a03493b0a72",
+      "docType": 3,
+      "master": "d9a38f57d018489f9b5cb81129d34322",
+      "path": "source/f97d8f1964ae4cf7962d6a03493b0a72.json",
+      "size": 3958944,
+      "sha256": "041ca132ecbca3355f8020c6f2577ef05e3e5ef82bf4918ca6cab2ab7ff27692"
+    },
+    {
+      "doc_uuid": "20f470577dd54f808cb5a12861ffa012",
+      "docType": 3,
+      "master": "7018f537f83544c296a550049d87bb05",
+      "path": "source/20f470577dd54f808cb5a12861ffa012.json",
+      "size": 438808,
+      "sha256": "53853ad881956fba1931fdd080978f37832f70951c584b11954e7044d8f24791"
+    },
+    {
+      "doc_uuid": "8140f60849fa4d8f8cd8df4afdcf4e85",
+      "docType": 3,
+      "master": "6a7eb328c76c4da994ff0d94384c122c",
+      "path": "source/8140f60849fa4d8f8cd8df4afdcf4e85.json",
+      "size": 421609,
+      "sha256": "b2963d25009c639335cbdf8b9740c6c0e987e19c0c18c488f78698f4b0350a62"
+    }
+  ],
+  "editor_version": "6.4.20.6"
 }