飞控-77: 74 std flight-controller projects ingested

Topic-pull from local listing index (`name OR introduction` contains
飞控). 77 std hits in oshwhub_listing_full.jsonl, minus 2 already
crawled = 75 attempted; 74 OK + 1 hard fail (`m1_mh743_ada_v4`,
listing entry missing `count.like`).

dev1 walltime: Step 1 ~12s, Step 4 ~80s (concurrency=5).
License mix: 65% GPL 3.0, 11% Public Domain, 11% MIT, 4% CC variants.

3 partial dirs (Step 1 KeyError on missing `count.like`) dropped — to
be re-fetched after a follow-up crawler patch makes count fields
defensive against listing-index outliers.

Source backfill 74/74 OK, total +46 MB.

data/raw/oshwhub/a4635267bd234524a2a8656d0b185f25/metadata.json

@@ -0,0 +1,61 @@
+{
+  "source": "oshwhub",
+  "source_url": "https://oshwhub.com/TWENTYY/c8t6-littleboard",
+  "project_id": "a4635267bd234524a2a8656d0b185f25",
+  "title": "STM32F103C8T6核心板",
+  "description_short": "STM32F103C8T6核心板 ，用于验证手头的原理图没有问题，已经成功烧写了BetaFight飞控程序（NAZE V3.5）",
+  "description_path": "description.md",
+  "author": {
+    "username": "TWENTYY",
+    "display_name": "TWENTYY",
+    "user_id": "aeb0df0bf1514597826802707819a3ff"
+  },
+  "license": "GPL 3.0",
+  "tags": [],
+  "created_at": "2020-07-07T05:37:38.000Z",
+  "updated_at": "2024-03-14T00:35:29.000Z",
+  "published_at": "2022-01-07T08:26:03.000Z",
+  "crawled_at": "2026-04-30T10:49:15.929539+00:00",
+  "metrics": {
+    "likes": 32,
+    "stars": 93,
+    "forks": 101,
+    "views": 14150,
+    "watch": 0,
+    "comments": 5
+  },
+  "cover": {
+    "url": "https://image.lceda.cn/pullimage/yFHufTN586o7xDaGFa0A0sD2QmONgSUCHg0uDFl2.jpeg",
+    "path": null
+  },
+  "files": [],
+  "raw_fields": {
+    "path": "TWENTYY/c8t6-littleboard",
+    "grade": 2,
+    "origin": "std",
+    "public": true,
+    "publish": true,
+    "skipped_files": []
+  },
+  "source_format": "easyeda-std",
+  "source_path": "source/",
+  "source_documents": [
+    {
+      "doc_uuid": "d2c666f261114ba4bf396601d5954940",
+      "docType": 1,
+      "master": "d9527511262841dba74d2f59b802720a",
+      "path": "source/d2c666f261114ba4bf396601d5954940.json",
+      "size": 104393,
+      "sha256": "ed747d87bcd310246d5833f4dd0b32c80ce7ca0d3a20e30a4fd2de0d3d3b7cdc"
+    },
+    {
+      "doc_uuid": "6235de35447c4563962f8360873c219c",
+      "docType": 3,
+      "master": "0b158c3f67ce46bca67961feb0bcdde0",
+      "path": "source/6235de35447c4563962f8360873c219c.json",
+      "size": 244435,
+      "sha256": "f6ff9c35c5aada63cea07879daca72aa98dc63e582b56aea4c06a12eba691a4c"
+    }
+  ],
+  "editor_version": "6.3.53"
+}