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/_urls.json

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+{
+  "detail_url": "https://oshwhub.com/chocolatem/maruko",
+  "cover_url": "https://image.lceda.cn/pullimage/RIb9QoFuWf6RQRoPqaESWAPSYhHuevmfb6q81iAX.jpeg",
+  "attachments": []
+}

data/raw/oshwhub/1f574fed507041ab99b08ecce0c187db/description.md

@@ -0,0 +1,9 @@
+# Maruko小四轴飞控
+
+四轴飞行器主控板，基于F4芯片。100MHz主频.
+
+---
+- Source: https://oshwhub.com/chocolatem/maruko
+- Author: 大丸子 (chocolatem)
+- License: BSD
+- Published: 2023-04-06T01:59:30.000Z

data/raw/oshwhub/1f574fed507041ab99b08ecce0c187db/metadata.json

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+  "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",
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+    "forks": 19,
+    "views": 14202,
+    "watch": 0,
+    "comments": 5
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+    "path": null
+  },
+  "files": [],
+  "raw_fields": {
+    "path": "chocolatem/maruko",
+    "grade": 2,
+    "origin": "std",
+    "public": true,
+    "publish": true,
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data/raw/oshwhub/1f574fed507041ab99b08ecce0c187db/source/manifest.json

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