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/03b939e5e6e544408e0879202ebc20ce/metadata.json

@@ -190,5 +190,52 @@
     "public": true,
     "publish": true,
     "skipped_files": []
-  }
+  },
+  "source_format": "easyeda-pro-legacy",
+  "source_path": "source/",
+  "source_documents": [
+    {
+      "doc_uuid": "08becbd246bd4d43ac70623007868e6e",
+      "docType": 1,
+      "path": "source/08becbd246bd4d43ac70623007868e6e.json",
+      "size": 833,
+      "sha256": "2721c1c9a5df4c7f472071db322535eb7a2d7a93c2c80e0d5dfd89fd73ba386b"
+    },
+    {
+      "doc_uuid": "c3ae01c4945a472092472634880f93cc",
+      "docType": 1,
+      "path": "source/c3ae01c4945a472092472634880f93cc.json",
+      "size": 815,
+      "sha256": "523bbd8c5d85c17604086784efdd825dad089f149ef6dc050ecd01f544a33dcd"
+    },
+    {
+      "doc_uuid": "69160f86cb7841289e485822d57c6db4",
+      "docType": 1,
+      "path": "source/69160f86cb7841289e485822d57c6db4.json",
+      "size": 747,
+      "sha256": "e21a8cfcc544d74ade2735e07bdcac8a176e1086b7384ff0b2a232410de6855a"
+    },
+    {
+      "doc_uuid": "b48906040b744a91ab71667a0b156292",
+      "docType": 1,
+      "path": "source/b48906040b744a91ab71667a0b156292.json",
+      "size": 729,
+      "sha256": "18002369811da12198b37cf43213e88101272bf276ffc670cf1f6585044c5ab0"
+    },
+    {
+      "doc_uuid": "8dc7b44109f0468e8c9d87d578e1dc37",
+      "docType": 3,
+      "path": "source/pcb_8dc7b44109f0468e8c9d87d578e1dc37.json",
+      "size": 794,
+      "sha256": "ddb50292e4a3243f28e416839dea427336c0c9db2c451a2e1932153ed755697f"
+    },
+    {
+      "doc_uuid": "3986b2c580d34373b4122266371a6ba1",
+      "docType": 3,
+      "path": "source/pcb_3986b2c580d34373b4122266371a6ba1.json",
+      "size": 792,
+      "sha256": "b1c06bfb8a836ccfa0025b0e19bf8fef41f65a3c249e6abcc74d1a42235e4fab"
+    }
+  ],
+  "editor_version": "2.2.32.3"
 }