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/1f574fed507041ab99b08ecce0c187db/metadata.json

@@ -0,0 +1,61 @@
+{
+  "source": "oshwhub",
+  "source_url": "https://oshwhub.com/chocolatem/maruko",
+  "project_id": "1f574fed507041ab99b08ecce0c187db",
+  "title": "Maruko小四轴飞控",
+  "description_short": "四轴飞行器主控板，基于F4芯片。100MHz主频.",
+  "description_path": "description.md",
+  "author": {
+    "username": "chocolatem",
+    "display_name": "大丸子",
+    "user_id": "14b961b78aba4a24b6a8fc88e40f73f0"
+  },
+  "license": "BSD",
+  "tags": [],
+  "created_at": "2019-11-24T14:52:52.000Z",
+  "updated_at": "2023-04-04T02:45:50.000Z",
+  "published_at": "2023-04-06T01:59:30.000Z",
+  "crawled_at": "2026-04-30T10:49:13.218216+00:00",
+  "metrics": {
+    "likes": 21,
+    "stars": 58,
+    "forks": 19,
+    "views": 14202,
+    "watch": 0,
+    "comments": 5
+  },
+  "cover": {
+    "url": "https://image.lceda.cn/pullimage/RIb9QoFuWf6RQRoPqaESWAPSYhHuevmfb6q81iAX.jpeg",
+    "path": null
+  },
+  "files": [],
+  "raw_fields": {
+    "path": "chocolatem/maruko",
+    "grade": 2,
+    "origin": "std",
+    "public": true,
+    "publish": true,
+    "skipped_files": []
+  },
+  "source_format": "easyeda-std",
+  "source_path": "source/",
+  "source_documents": [
+    {
+      "doc_uuid": "a5804b5ec4154f06ac8506fbe5a092ca",
+      "docType": 1,
+      "master": "b1b16b7dcede4718b27f353cfe825a53",
+      "path": "source/a5804b5ec4154f06ac8506fbe5a092ca.json",
+      "size": 120366,
+      "sha256": "7f74aac840bf3ab27de01d0c58b3e0dc974456069fdf0a644aa589c6d0b34822"
+    },
+    {
+      "doc_uuid": "98a376a4f3834e11952128d9ce93f8bd",
+      "docType": 3,
+      "master": "0a93358aa1e24b9b8ff5df6ead48356d",
+      "path": "source/98a376a4f3834e11952128d9ce93f8bd.json",
+      "size": 194790,
+      "sha256": "c8aead13441731dfeba82298504f8c6b736bd619c17705c4bd0e1a9e2cdffa1e"
+    }
+  ],
+  "editor_version": "6.5.27"
+}