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/0bc142e0f24e4b06ab6d555f935eca98/metadata.json

@@ -64,5 +64,108 @@
     "public": true,
     "publish": true,
     "skipped_files": []
-  }
+  },
+  "source_format": "easyeda-pro-legacy",
+  "source_path": "source/",
+  "source_documents": [
+    {
+      "doc_uuid": "389fb15ca3f741129932dc46c9311adc",
+      "docType": 1,
+      "path": "source/389fb15ca3f741129932dc46c9311adc.json",
+      "size": 87755,
+      "sha256": "590b969b4f848c88c862417659a8601b0c2218b184226bc82f949f94e6841efb"
+    },
+    {
+      "doc_uuid": "1cd33a65eadc49c1a34dc8d3d72a06e5",
+      "docType": 1,
+      "path": "source/1cd33a65eadc49c1a34dc8d3d72a06e5.json",
+      "size": 85403,
+      "sha256": "9c68acd75b6d8c552b22d435ccb2c215620cf61d1c92d2545ee6a57442698129"
+    },
+    {
+      "doc_uuid": "8f67d44f9286433a8ece8d0ecbb040bc",
+      "docType": 1,
+      "path": "source/8f67d44f9286433a8ece8d0ecbb040bc.json",
+      "size": 85460,
+      "sha256": "6dcf0a8785635af27e3dc7dca0bba8fa1677ecb291789603c75f98f81f2f9c59"
+    },
+    {
+      "doc_uuid": "0faff70e3c264e7b8d161410f50db45f",
+      "docType": 1,
+      "path": "source/0faff70e3c264e7b8d161410f50db45f.json",
+      "size": 87486,
+      "sha256": "fb008d13d3823daa24de7fc2f8fbb354ed7212f5ecd21e276fe6120044087198"
+    },
+    {
+      "doc_uuid": "f4892adcdd2444ad9ebe8a53ba518eab",
+      "docType": 1,
+      "path": "source/f4892adcdd2444ad9ebe8a53ba518eab.json",
+      "size": 93306,
+      "sha256": "3b8938b9ea09edae61e1c8e3b2d8450ddf2b0abeee7af09d4d399389581f1a1b"
+    },
+    {
+      "doc_uuid": "db409864ee02418f826753275ee7d68e",
+      "docType": 1,
+      "path": "source/db409864ee02418f826753275ee7d68e.json",
+      "size": 93220,
+      "sha256": "7f7f2ed9b4a459809f6fa962c71288c8058347f4fab81b1b10da7091c7ca34c3"
+    },
+    {
+      "doc_uuid": "6833cef06efc4beaa6dbb6d02e777631",
+      "docType": 1,
+      "path": "source/6833cef06efc4beaa6dbb6d02e777631.json",
+      "size": 96400,
+      "sha256": "57f633b04a08f3103abecbf286d12c35266676d356caff222783685d7ee19e0b"
+    },
+    {
+      "doc_uuid": "85555ad757d742d28460ec3bf07dabf3",
+      "docType": 3,
+      "path": "source/pcb_85555ad757d742d28460ec3bf07dabf3.json",
+      "size": 155161,
+      "sha256": "bd130ff1a83b0abb8769c44cf1511e90afce868302274decabf2a82e8ff8a70f"
+    },
+    {
+      "doc_uuid": "59ed570e8443480a9ed6257fd24bc2b9",
+      "docType": 3,
+      "path": "source/pcb_59ed570e8443480a9ed6257fd24bc2b9.json",
+      "size": 154321,
+      "sha256": "efd030754651ac72bb4ec20deeb9b556b7a353d02fd491b4e16b3c78ea58b4f1"
+    },
+    {
+      "doc_uuid": "1882ec8e2b484d4e92a62107a0883325",
+      "docType": 3,
+      "path": "source/pcb_1882ec8e2b484d4e92a62107a0883325.json",
+      "size": 153061,
+      "sha256": "2c6a493f2c89ff1eb5d80fcd219f034a1cd1a68b506b448713dda16f398d43ea"
+    },
+    {
+      "doc_uuid": "7418fd0afcf44de2a9fa7c6d2f0fc54c",
+      "docType": 3,
+      "path": "source/pcb_7418fd0afcf44de2a9fa7c6d2f0fc54c.json",
+      "size": 154949,
+      "sha256": "1ec7a621fd958acb5e270418416522e81851e7eb1fc43bf2270c41e52fa51d68"
+    },
+    {
+      "doc_uuid": "51a001981959427f9286db00325c0928",
+      "docType": 3,
+      "path": "source/pcb_51a001981959427f9286db00325c0928.json",
+      "size": 168504,
+      "sha256": "2fc6fc26380627e5380a99e534cc7d258358f70decc7d1ce2cb14bfb1c0d3cf1"
+    },
+    {
+      "doc_uuid": "0171634d520840aa9bf36ee555628868",
+      "docType": 3,
+      "path": "source/pcb_0171634d520840aa9bf36ee555628868.json",
+      "size": 174062,
+      "sha256": "0beff0dc6deea6b8299ea92e559076f781221f73c255360a3327f68aaef42abb"
+    },
+    {
+      "doc_uuid": "829594a7f4254f91bb7c3bba1a28d2dc",
+      "docType": 3,
+      "path": "source/pcb_829594a7f4254f91bb7c3bba1a28d2dc.json",
+      "size": 169378,
+      "sha256": "e223a1a6910cf82efc94d7fe127d73aeaf9367d11d0dfea06682816651a9d67b"
+    }
+  ],
+  "editor_version": "2.1.22.c2e45758"
 }