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/3e3c7725251c4456ad91cd88308944ff/metadata.json

@@ -109,5 +109,45 @@
     "public": true,
     "publish": true,
     "skipped_files": []
-  }
+  },
+  "source_format": "easyeda-pro-legacy",
+  "source_path": "source/",
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+      "sha256": "7adde313ff1e7104b6f5faeb0523a415102ddcb4717f75ded0a708e27d6e5c7e"
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+      "sha256": "69b312f973b32a68a1db1384d5f05d397b2f90abae8943cec3deb9b3fb0c03cf"
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 }

data/raw/oshwhub/3e3c7725251c4456ad91cd88308944ff/source/coppers.json

@@ -0,0 +1 @@
+[]

data/raw/oshwhub/3e3c7725251c4456ad91cd88308944ff/source/manifest.json

@@ -0,0 +1,76 @@
+{
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+      "pcb": "90a3dd614a2544a8bf056af698e0019e",
+      "name": "底板"
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+}

data/raw/oshwhub/3e3c7725251c4456ad91cd88308944ff/source/ticket.json

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