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/41dbabaaf5f04a8385d5eb701246bbb3/metadata.json

@@ -0,0 +1,53 @@
+{
+  "source": "oshwhub",
+  "source_url": "https://oshwhub.com/fgdfhdr/kai-yuan-15-yuan-gu-ding-yi-fei-kong",
+  "project_id": "41dbabaaf5f04a8385d5eb701246bbb3",
+  "title": "17元固定翼飞控，双层板、单面布局",
+  "description_short": "17元固定翼飞控，双层板、单面布局、0603阻容。支持ppm、sbus、elrs，单发四舵...",
+  "description_path": "description.md",
+  "author": {
+    "username": "fgdfhdr",
+    "display_name": "荣妹儿科技",
+    "user_id": "cc3b4f18fef448d69d4bd9094634e541"
+  },
+  "license": "GPL 3.0",
+  "tags": [],
+  "created_at": "2025-08-17T08:27:52.000Z",
+  "updated_at": "2025-08-23T04:48:15.962Z",
+  "published_at": "2025-08-25T03:37:06.000Z",
+  "crawled_at": "2026-04-30T10:49:18.451033+00:00",
+  "metrics": {
+    "likes": 22,
+    "stars": 39,
+    "forks": 31,
+    "views": 3134,
+    "watch": 0,
+    "comments": 14
+  },
+  "cover": {
+    "url": "https://image.lceda.cn/oshwhub/pullImage/6f6dd04a928a454cb537ebd404fb1bc8.jpg",
+    "path": null
+  },
+  "files": [],
+  "raw_fields": {
+    "path": "fgdfhdr/kai-yuan-15-yuan-gu-ding-yi-fei-kong",
+    "grade": 1,
+    "origin": "std",
+    "public": true,
+    "publish": true,
+    "skipped_files": []
+  },
+  "source_format": "easyeda-std",
+  "source_path": "source/",
+  "source_documents": [
+    {
+      "doc_uuid": "571e9823757b4c4eb46af49b7ab06a43",
+      "docType": 3,
+      "master": "cabf244cae8a442188f5a3633cc2bf54",
+      "path": "source/571e9823757b4c4eb46af49b7ab06a43.json",
+      "size": 1041847,
+      "sha256": "4aa51bdb33c81a2961b3480c494b20554668d330b2bff0ff1ec95fe1a72fb8b3"
+    }
+  ],
+  "editor_version": "6.5.39"
+}