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/d46ef2f68e334a72961d48ba0cfbcae2/source/manifest.json

@@ -0,0 +1,58 @@
+{
+  "project_uuid": "d46ef2f68e334a72961d48ba0cfbcae2",
+  "fetched_at": "2026-04-28T17:55:19.070976+00:00",
+  "editor_version": "2.1.20.656218ea.b3811b",
+  "boards": [
+    {
+      "sch": "c7a3ca9240f84b4e893ec0e8a79fdf4a",
+      "pcb": "8e8e01b37c3b4038a94b8482bd356692",
+      "name": "主电路"
+    }
+  ],
+  "documents": [
+    {
+      "doc_uuid": "a09a01601eaf49deb11fb4595aed9863",
+      "docType": 1,
+      "path": "source/a09a01601eaf49deb11fb4595aed9863.json",
+      "size": 98893,
+      "sha256": "c5c41bdf8acb6a1243a07df29c07ef723663b897b04a1753e8c74b2c038be227"
+    },
+    {
+      "doc_uuid": "a777b7fc2b46455c9ebaa746003e0f1c",
+      "docType": 1,
+      "path": "source/a777b7fc2b46455c9ebaa746003e0f1c.json",
+      "size": 43429,
+      "sha256": "3c979a89ed378568a48b27ac29161e50aee5cd95b495b927442e76b0ffdcca0d"
+    },
+    {
+      "doc_uuid": "8c99a51ab9b34c15bdf93dc7f10fc3ec",
+      "docType": 1,
+      "path": "source/8c99a51ab9b34c15bdf93dc7f10fc3ec.json",
+      "size": 123831,
+      "sha256": "5896fa8ccc45bffdfa42aca0889ba6d32179da82f3f942b077b6069d5dc431e3"
+    },
+    {
+      "doc_uuid": "8e8e01b37c3b4038a94b8482bd356692",
+      "docType": 3,
+      "path": "source/pcb_8e8e01b37c3b4038a94b8482bd356692.json",
+      "size": 453375,
+      "sha256": "838528be51efac5053d4d8401e639876168e81f271e3d3ade895b1705271e8f3"
+    }
+  ],
+  "structure_summary": {
+    "boards": 1,
+    "schematic_containers": 1,
+    "schematic_sheets": 3,
+    "pcbs": 1,
+    "symbols": 179,
+    "footprints": 149,
+    "devices": 238,
+    "coppers": 6,
+    "textpath": 3,
+    "blobs": 0
+  },
+  "aux": {
+    "coppers_count": 0,
+    "textpath_count": 3
+  }
+}