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打通 oshwhub origin=pro 现代 Pro 3.x 工程的 EPRO2 源抓取链路。3/5
modern Pro 项目完整解出（共 8423 docs / 542 MB plain）：
- X86 主板 7374 docs / 481 MB plain (chain=85, editor=3.2.15)
- 220V 桌面电源 771 docs / 26 MB plain (chain=28, editor=3.2.69)
- ESP-VoCat 278 docs / 7.5 MB plain (chain=12, editor=3.2.91)
剩余 2/5 是 legacy Pro 2.x（立创泰山派 RK3566、梁山派），项目 meta
返回 branch_uuid=null + editorVersion="2.1.40"，没有 git-style chain
模型，文档直接挂在 boards[].sch/pcb 字段上，访问端点暂未挖通；元
数据落库 metadata.json，source/ 留空。
实现要点：
- fetch_pro_source(): 4 步流程（project → branch HEAD → structures
→ /branches/<B>/histories/<HEAD> 即返完整 chain，无需 ?limit 批量
端点）+ 逐 history 走 AES-128-GCM 解密（16 字节 IV，pycryptodome
原生支持）+ gunzip + 按 DOCHEAD 切 per-doc EPRO2 流
- EPRO2 解析坑：行末单 `|` 是行终止符不是字段分隔符，必须先
rstrip("|") 再 split("||")，否则 payload JSON 解析失败 silently
swallow 导致 cur_doc 不设 → 第一轮 X86 板 7374 docs 抽出来只剩 2 个
- docType 实测远不止 BOARD/PCB/SCH/SCH_PAGE，还含 SYMBOL /
FOOTPRINT / DEVICE / BLOB / FONT / CONFIG —— Pro 把组件库快照也
随项目存到 history，下游做 EPRO2→KiCad 转换时必须先把这些 lib
doc 加载进 symbol cache
- Pro 2.x vs 3.x 是不同存储模型 —— 3.x 走 branch 模型（已打通），
2.x 走 boards[] 直链（未打通）；判别条件：project meta 的
branch_uuid 是否为 null
CLI 新增 --with-pro-source / --backfill-pro-source / --pro-cookie /
--origin（按 origin 字段服务端过滤 listing API），crawl_one() 按
origin=pro 自动 dispatch 到 Pro fetcher。
schema：docType 类型从 integer 放宽到 [integer, string, null]
（兼容 Std 的 1/3 + Pro 的 BOARD/SCH 等），新增 message_count 字段。
License 注意：本批 5 个项目全是 NC-SA / GPL，未达 Pro source doc
§4.2 Forge 白名单（MIT/BSD/Apache/CC0/CC-BY/CERN-OHL-P/Unlicense）。
按 CLAUDE.md "研究用、不再分发" 原则 raw 入库无碍；Forge 投影时
另过白名单。
详细技术细节见 docs/sources/easyeda_pro_source.md rev 3 + log.md。
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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{"type":"DOCHEAD","ticket":1509}||{"docType":"DEVICE","client":"5796efe0-71be-4764-a7be-8620972bb90b","uuid":"1386bc8c7ae542a2b774b0267842f358","updateTime":1740022912000,"version":"1657397245","user":{"uuid":"f6d958b048194965970a097419f0f68a","nickname":"重庆枫叶","username":"cqlcp","avatar":"//image.lceda.cn/avatars/2026/1/FneZQD4JKfDDm92UUIa483axw2OD9PF1E07L9Aby.webp"}}|
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{"type":"DOCHEAD","ticket":1510}||{"docType":"DEVICE","client":"5796efe0-71be-4764-a7be-8620972bb90b","uuid":"1386bc8c7ae542a2b774b0267842f358","updateTime":1740022912000,"version":"1657397245","user":{"uuid":"f6d958b048194965970a097419f0f68a","nickname":"重庆枫叶","username":"cqlcp","avatar":"//image.lceda.cn/avatars/2026/1/FneZQD4JKfDDm92UUIa483axw2OD9PF1E07L9Aby.webp"}}|
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{"type":"META","ticket":1511,"id":"META"}||{"title":"HL-AM-2835H489W-S1-08HL-HR3_C210310","tags":["光电器件","发光二极管/LED"],"source":"bc7228cc4d034fb2949ec4150c90fff7|0819f05c4eef4c71ace90d822a990e87","images":["https://alimg.szlcsc.com/upload/public/product/middle/20230108/EB795A801E8A86009BE459A119F83EDA.jpg"],"attributes":{"LCSC Part Name":"白灯 正贴 色温3000K","Supplier Part":"C210310","Manufacturer":"HONGLITRONIC(鸿利光电)","Manufacturer Part":"HL-AM-2835H489W-S1-08HL-HR3","Supplier Footprint":"SMD2835","JLCPCB Part Class":"扩展库","Datasheet":"https://atta.szlcsc.com/upload/public/pdf/source/20200909/C210311_665F1F7249D0499297E45CA2E817FB65.pdf","Supplier":"LCSC","Add into BOM":"yes","Convert to PCB":"yes","Symbol":"5632a93057fe4a22b0e4aadef43992b0","Designator":"LED?","Footprint":"e169bc11d67e4622b6bd2b7b1b339b21","3D Model":"dae59e0b18f845ce97497066cb96f6ce","3D Model Title":"LED-SMD_L3.5-W2.8-H0.7","3D Model Transform":"141.732,110.236,0,0,0,0,-9.492,0,0","Emitted Color":"白色","Forward Voltage (VF)":"3.4V","Power Dissipation":"306mW","Forward Current":"60mA","Dominant Wavelength":"-","Peak Wavelength":"-","Diode Configuration":"-","Lens Color":"雾状黄透镜","Color Temperature":"3000K","Viewing Angle":"120°","Mounting Sytle":"正贴","Operating Temperature":"-40℃~+85℃","Name":"={Manufacturer Part}","Description":"发光颜色:白色;正向电压(VF):3.4V;功率:306mW;正向电流:60mA;主波长:-;二极管配置:-;透镜颜色:雾状黄透镜;色温:3000K;发光角度:120°;载带方式:正贴;工作温度:-40℃~+85℃;"}}|
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