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/c8142997cb5c4e43acc5be42f54be6d2/metadata.json

@@ -46,5 +46,52 @@
     "public": true,
     "publish": true,
     "skipped_files": []
-  }
+  },
+  "source_format": "easyeda-pro-legacy",
+  "source_path": "source/",
+  "source_documents": [
+    {
+      "doc_uuid": "fbcf0a2878f74c7681aba5b372d44040",
+      "docType": 1,
+      "path": "source/fbcf0a2878f74c7681aba5b372d44040.json",
+      "size": 841,
+      "sha256": "edbf931d6ea91186ca9ae1e803f3b5ae1b6fc006185697aa75e81fa7b5eca45c"
+    },
+    {
+      "doc_uuid": "3cdbd77c3bc245f58c6b673e5fbf87c1",
+      "docType": 1,
+      "path": "source/3cdbd77c3bc245f58c6b673e5fbf87c1.json",
+      "size": 826,
+      "sha256": "d8218fb7f496a0e1a2f42915382cc2956b7c4f65928e94239acac55c4e82204a"
+    },
+    {
+      "doc_uuid": "ffba2813c1644833ab846f4cf95b273f",
+      "docType": 1,
+      "path": "source/ffba2813c1644833ab846f4cf95b273f.json",
+      "size": 826,
+      "sha256": "ba829b8508b3f90439873b6f08efeba32f000827f2d5e177004214841041fced"
+    },
+    {
+      "doc_uuid": "e59b9aeb88ed486b83e2decb47b25f8e",
+      "docType": 1,
+      "path": "source/e59b9aeb88ed486b83e2decb47b25f8e.json",
+      "size": 733,
+      "sha256": "c7302faf650b4887a3b7eb664138bb1b3695398d0b878b4f2d0d073143a201f1"
+    },
+    {
+      "doc_uuid": "053a2dbba67c4a428ef47aba49d12938",
+      "docType": 3,
+      "path": "source/pcb_053a2dbba67c4a428ef47aba49d12938.json",
+      "size": 799,
+      "sha256": "52d142be8a063b2936b617ebbfd8748ad3657d14feff1e8386f4a230f0391682"
+    },
+    {
+      "doc_uuid": "a56383843d874b4fb69accd15f105dcb",
+      "docType": 3,
+      "path": "source/pcb_a56383843d874b4fb69accd15f105dcb.json",
+      "size": 785,
+      "sha256": "50582a253d44e719b3a59e3a606f618e9bfc1e270a5994a691189acb68e0b838"
+    }
+  ],
+  "editor_version": "2.2.32.3"
 }