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/91206ca73e96455f946bfcdd73e814fd/_urls.json

@@ -0,0 +1,16 @@
+{
+  "detail_url": "https://oshwhub.com/XACT/rt300-mkv",
+  "cover_url": "https://image.lceda.cn/pullimage/G0Yvb3LsUUqWspquWfqe3ray1cucrfmoPvXxT7H2.jpeg",
+  "attachments": [
+    {
+      "name": "video_20240608_002422.mp4",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/1fdcbde12c2f4a6faf8c519be4e72984.mp4",
+      "original_id": "d76ad6faae0240518eb7640ba8fc02cc"
+    },
+    {
+      "name": "RT300-MKV UserManual_24JUL25.pdf",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/a57ca3d5e7b54417aae014e2f12f17fa.pdf",
+      "original_id": "5dc0b16067344ed6bfc15471f2a3bd2a"
+    }
+  ]
+}

data/raw/oshwhub/91206ca73e96455f946bfcdd73e814fd/description.md

@@ -0,0 +1,9 @@
+# RT300-MKV 250W 数控升降压桌面可调电源
+
+RT300-MKV-EXTREME 同步混合功率级自动范围升降压型数控可调电源
+
+---
+- Source: https://oshwhub.com/XACT/rt300-mkv
+- Author: XACT (XACT)
+- License: CC BY-NC-SA 4.0
+- Published: 2024-08-01T01:03:58.000Z

data/raw/oshwhub/91206ca73e96455f946bfcdd73e814fd/metadata.json

@@ -0,0 +1,63 @@
+{
+  "source": "oshwhub",
+  "source_url": "https://oshwhub.com/XACT/rt300-mkv",
+  "project_id": "91206ca73e96455f946bfcdd73e814fd",
+  "title": "RT300-MKV 250W 数控升降压桌面可调电源",
+  "description_short": "RT300-MKV-EXTREME 同步混合功率级自动范围升降压型数控可调电源",
+  "description_path": "description.md",
+  "author": {
+    "username": "XACT",
+    "display_name": "XACT",
+    "user_id": "e622ba5d959740ed90f4845a433def3a"
+  },
+  "license": "CC BY-NC-SA 4.0",
+  "tags": [],
+  "created_at": "2020-12-25T06:25:11.000Z",
+  "updated_at": "2025-12-19T01:07:55.000Z",
+  "published_at": "2024-08-01T01:03:58.000Z",
+  "crawled_at": "2026-04-23T11:26:39.736414+00:00",
+  "metrics": {
+    "likes": 867,
+    "stars": 1735,
+    "forks": 782,
+    "views": 185523,
+    "watch": 0,
+    "comments": 231
+  },
+  "cover": {
+    "url": "https://image.lceda.cn/pullimage/G0Yvb3LsUUqWspquWfqe3ray1cucrfmoPvXxT7H2.jpeg",
+    "path": "cover.jpeg"
+  },
+  "files": [
+    {
+      "name": "video_20240608_002422.mp4",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/1fdcbde12c2f4a6faf8c519be4e72984.mp4",
+      "original_id": "d76ad6faae0240518eb7640ba8fc02cc",
+      "ext": "mp4",
+      "mime": "video/mp4",
+      "size": 81553791,
+      "md5": "becffa3b615f415101f85d18b9bbfcf9",
+      "path": "files/video_20240608_002422.mp4",
+      "sha256": "06864530d9ef794927c8826b7e2e5bd7349587f9b6035e76606331bcba25fbd3"
+    },
+    {
+      "name": "RT300-MKV UserManual_24JUL25.pdf",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/a57ca3d5e7b54417aae014e2f12f17fa.pdf",
+      "original_id": "5dc0b16067344ed6bfc15471f2a3bd2a",
+      "ext": "pdf",
+      "mime": "application/pdf",
+      "size": 3320936,
+      "md5": "7f97a35fda72a0462ec8401d739ffd41",
+      "path": "files/RT300-MKV UserManual_24JUL25.pdf",
+      "sha256": "19eacef139ed672806a7bf492668b3f09e729d8c6eac6d2e5ed79aca8704685e"
+    }
+  ],
+  "raw_fields": {
+    "path": "XACT/rt300-mkv",
+    "grade": 4,
+    "origin": "std",
+    "public": true,
+    "publish": true,
+    "skipped_files": []
+  }
+}