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/405e72f7ef4d449ca781a8de06df9fec/_urls.json

@@ -0,0 +1,31 @@
+{
+  "detail_url": "https://oshwhub.com/fjbf/wu-ren-ji-di-ban",
+  "cover_url": "https://image.lceda.cn/pullimage/OX5hWCPT8ezauhx5wN0dkx5UApkoa8sYzLlhSgaU.jpeg",
+  "attachments": [
+    {
+      "name": "t265调参版本7.25.zip",
+      "url": "https://image.lceda.cn/attachments/2023/9/97Lo3yzcZGIk2NUOTff3dQqW2LY13x8mSDP7QxkG.zip",
+      "original_id": "e8a2f8372dfd48e5abfa2fd2fa57df70"
+    },
+    {
+      "name": "arduino.ino",
+      "url": "https://image.lceda.cn/attachments/2023/9/er7aDr4ZnSJAfWCj2Wh5XGdCO2QqZCKEwCS2GOiM.txt",
+      "original_id": "9c77e60232e34c3a92a593ebb67bcf85"
+    },
+    {
+      "name": "MainCODE (2).zip",
+      "url": "https://image.lceda.cn/attachments/2023/9/WlegO81bG2jlUZ1p6uesIzZiRAxvXWGj8uULeicP.zip",
+      "original_id": "6765954469224cc7a969cc2478adac8d"
+    },
+    {
+      "name": "盲走小车.zip",
+      "url": "https://image.lceda.cn/attachments/2023/9/cMQJ2Gml0BzanGSFWG3ZPVXFt9m7gO2qA5haXLaO.zip",
+      "original_id": "60b44e0cae7648ecba8aebce2edd1701"
+    },
+    {
+      "name": "VID_20230803_202702.mp4",
+      "url": "https://image.lceda.cn/attachments/2023/9/Nd6lylrPpbbwslqOy7gxi21Rj3M118JOmDM7iB9e.mp4",
+      "original_id": "730114cd185a410e88789a0b283c5a6f"
+    }
+  ]
+}