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/ec8a8499750b4e729d3e93e842edc68b/metadata.json

@@ -73,5 +73,58 @@
     "public": true,
     "publish": true,
     "skipped_files": []
-  }
+  },
+  "source_format": "easyeda-std",
+  "source_path": "source/",
+  "source_documents": [
+    {
+      "doc_uuid": "4885fe037e3344849026332214ee1305",
+      "docType": 1,
+      "master": "5633f597e18a453aa134e62da6f57423",
+      "path": "source/4885fe037e3344849026332214ee1305.json",
+      "size": 406568,
+      "sha256": "a1663fcc423871a9f8ded3943751f15fcfda6a32c81f3b7263121bd3d90c1984"
+    },
+    {
+      "doc_uuid": "bdc7ce5b05a94362b0f208bc6cb43d05",
+      "docType": 3,
+      "master": "c39f90f14b4f4af586a98ef982b60170",
+      "path": "source/bdc7ce5b05a94362b0f208bc6cb43d05.json",
+      "size": 598522,
+      "sha256": "63687f81196e9f15ffcaa3fc209d17a64bc292c2951c348b1678c26de01f745c"
+    },
+    {
+      "doc_uuid": "dc7d4915d506493c97e7ecc502c8693a",
+      "docType": 1,
+      "master": "392ef3d1f9c04afd96022370e6d505fe",
+      "path": "source/dc7d4915d506493c97e7ecc502c8693a.json",
+      "size": 406568,
+      "sha256": "a1663fcc423871a9f8ded3943751f15fcfda6a32c81f3b7263121bd3d90c1984"
+    },
+    {
+      "doc_uuid": "12cceb7d4bef46b3ae87129a54409966",
+      "docType": 3,
+      "master": "5e2a81582ee64993bfbd51d72aa55987",
+      "path": "source/12cceb7d4bef46b3ae87129a54409966.json",
+      "size": 600949,
+      "sha256": "1ebd3b722a01f7da4d2deb33e8a5e03f81f92a2994cf1ca647debc77b51f5186"
+    },
+    {
+      "doc_uuid": "a40ae04bb1e74106b4ef98f259d19100",
+      "docType": 3,
+      "master": "76df55612b8f4338be13765b2cb43157",
+      "path": "source/a40ae04bb1e74106b4ef98f259d19100.json",
+      "size": 611191,
+      "sha256": "3a6455892f88169d107e07be47d7297c28f4134ee8c2ea2805bcec3d3beea2e6"
+    },
+    {
+      "doc_uuid": "7b2049b729ef42708c88e329007cd497",
+      "docType": 1,
+      "master": "feb4fee29c6d44a7a87c1111ef989276",
+      "path": "source/7b2049b729ef42708c88e329007cd497.json",
+      "size": 406568,
+      "sha256": "a1663fcc423871a9f8ded3943751f15fcfda6a32c81f3b7263121bd3d90c1984"
+    }
+  ],
+  "editor_version": "6.5.5"
 }