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/da55d50b394b4553bbcb799dc27a7e63/metadata.json

@@ -73,5 +73,52 @@
     "public": true,
     "publish": true,
     "skipped_files": []
-  }
+  },
+  "source_format": "easyeda-pro-legacy",
+  "source_path": "source/",
+  "source_documents": [
+    {
+      "doc_uuid": "e12e81ab5eff41939249d26ad1a3908a",
+      "docType": 1,
+      "path": "source/e12e81ab5eff41939249d26ad1a3908a.json",
+      "size": 821,
+      "sha256": "d6a5b5b1535f4b138943151342f78d3714ba7a5fe38df3bfe207a3ba7fc36729"
+    },
+    {
+      "doc_uuid": "9ff8ac1822874bd18e6ea0aac0cd2a00",
+      "docType": 1,
+      "path": "source/9ff8ac1822874bd18e6ea0aac0cd2a00.json",
+      "size": 829,
+      "sha256": "9bf24c19d61c4727bad37321e36fdb8330204e7ccde05bde0faa2e307e58809e"
+    },
+    {
+      "doc_uuid": "3aaa22d4db074abb9bdbec9f4d2621df",
+      "docType": 1,
+      "path": "source/3aaa22d4db074abb9bdbec9f4d2621df.json",
+      "size": 749,
+      "sha256": "b82db8e02cd16efbdb579133c81e2aa32ae6f45207107c1e52d66185d53adb4a"
+    },
+    {
+      "doc_uuid": "b88dec4b4ba24c9eb8d711c99c1c134f",
+      "docType": 1,
+      "path": "source/b88dec4b4ba24c9eb8d711c99c1c134f.json",
+      "size": 823,
+      "sha256": "88ad2b2062e314db96bbb090abe3f0b63bceabcdbead4ad46ef521d3b739ef0f"
+    },
+    {
+      "doc_uuid": "b8e0f8003e0c41589e3db29fe056c93a",
+      "docType": 3,
+      "path": "source/pcb_b8e0f8003e0c41589e3db29fe056c93a.json",
+      "size": 792,
+      "sha256": "7d91ff1e1e883a4d37a6d4fe043577617d590930ac3827fa4bacccd222aa56b0"
+    },
+    {
+      "doc_uuid": "66f43d188ff3485d8f3a5b34c2f35016",
+      "docType": 3,
+      "path": "source/pcb_66f43d188ff3485d8f3a5b34c2f35016.json",
+      "size": 793,
+      "sha256": "4251af17cba3d34572f2bc69485cbd3e9c5e29fcba858d2e36b45ed3d8b59624"
+    }
+  ],
+  "editor_version": "2.1.63"
 }