Phase 1 MVP: crawl 10 high-quality oshwhub projects into LFS

Why:
- Charles 指定：先爬 10 个高质量项目存 Gitea LFS，一个项目一个文件夹，
  保留原文件和 URL。先以小批量验证 schema + LFS 流水线，放量前再拍板
  存储规模。

What:
- crawlers/oshwhub: 列表 API (`/api/project?sort=hot`) + SSR HTML 解析，
  一次性产出 metadata / description / cover / files / _urls
- schemas/project.schema.json: 跨源统一 schema
- docs/sources/oshwhub.md: API 入口 / 字段映射 / 陷阱调研
- pyproject.toml: httpx[http2] 单依赖
- .gitattributes: data/raw/**/files/** 一律走 LFS（规则写窄，避免误伤 schemas/*.json 等）
- .gitignore: 移除 data/raw/* 排除（改走 LFS 入库）

10 个项目覆盖：调试器 / 加热台 / 盖革计数器 / 数控电源 / 焊台 /
智能手表 / USB 测电流 / ZVS 感应加热 / AI 开发板 / 红外热成像。
共 52 附件 ≈ 524 MB 入 LFS，筛选判据 grade=4 & likes>=100 & 多样性。

Known gaps（见 plan.md § Phase 1.4）：
- EasyEDA 源 JSON 需登录 (u.lceda.cn)，v0.1 跳过
- fs-web-stream.jlc.com 的工程源下载未测
- scripts/validate.py 自动 schema 校验未实现

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

data/raw/oshwhub/b077573dfb764e95b1d27faba49cca65/metadata.json

@@ -0,0 +1,63 @@
+{
+  "source": "oshwhub",
+  "source_url": "https://oshwhub.com/yanranxiaoxi/Multi-adaptation-Wi-Fi-Geiger-Counter-Double-Tube-Type",
+  "project_id": "b077573dfb764e95b1d27faba49cca65",
+  "title": "小汐 & 阿曈 -> 盖革计数器（MWGC-2T）",
+  "description_short": "⭐ 中文固件多管型 Wi-Fi 盖革计数器（MWGC-2T） ⭐",
+  "description_path": "description.md",
+  "author": {
+    "username": "yanranxiaoxi",
+    "display_name": "久治明千树汐",
+    "user_id": "eac388b086064c2087f67a10b524a911"
+  },
+  "license": "CC BY-SA 4.0",
+  "tags": [],
+  "created_at": "2023-03-11T16:40:16.000Z",
+  "updated_at": "2026-01-30T13:13:39.000Z",
+  "published_at": "2024-11-25T01:38:14.000Z",
+  "crawled_at": "2026-04-23T11:26:00.127742+00:00",
+  "metrics": {
+    "likes": 212,
+    "stars": 365,
+    "forks": 189,
+    "views": 49755,
+    "watch": 0,
+    "comments": 168
+  },
+  "cover": {
+    "url": "https://image.lceda.cn/pullimage/Z4KOXBgwtmwMIUpJC8ZSyFWeY6hBg2899oPP5UeZ.jpeg",
+    "path": "cover.jpeg"
+  },
+  "files": [
+    {
+      "name": "3D打印外壳与电池版改装.zip",
+      "url": "https://image.lceda.cn/attachments/2023/9/Ps19TA0QecWL9XXjgOxNhHxRj8FvpO7kttXqF8KI.zip",
+      "original_id": "de773a049b1149ea8f5b885277d839ac",
+      "ext": "zip",
+      "mime": "application/x-zip-compressed",
+      "size": 3798995,
+      "md5": "3ec71e545b0f0b70f93b58599c8d1c7e",
+      "path": "files/3D打印外壳与电池版改装.zip",
+      "sha256": "e23537c79e44be7dadb89ba82fb3b195ae2436d8200c62659f31a87093f6fd7e"
+    },
+    {
+      "name": "MWGC-Firmware_v0.1.3.20241125a.bin",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/f59327bb7a8f4180851468b9dee83944.bin",
+      "original_id": "df5c50cf692548afb2ee27096178c282",
+      "ext": "bin",
+      "mime": "application/octet-stream",
+      "size": 428496,
+      "md5": "7bd953b6a41c5ad621b7df5f47c3e6ed",
+      "path": "files/MWGC-Firmware_v0.1.3.20241125a.bin",
+      "sha256": "87bf7129731121ebaead85278e9aad8f8b2ea0ff3f5f9b3d46ed29e65f82d577"
+    }
+  ],
+  "raw_fields": {
+    "path": "yanranxiaoxi/Multi-adaptation-Wi-Fi-Geiger-Counter-Double-Tube-Type",
+    "grade": 4,
+    "origin": "std",
+    "public": true,
+    "publish": true,
+    "skipped_files": []
+  }
+}