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/eb1e9ddf771f47d1b898e4157f3f35f9/_urls.json

@@ -0,0 +1,31 @@
+{
+  "detail_url": "https://oshwhub.com/liguanxi/si-zhou-fei-xing-qi-ESP-Liguanxi",
+  "cover_url": "https://image.lceda.cn/pullimage/Wnk1skVOJqIuiILS7yOO0lrtbijusZJn8OraQIK3.jpeg",
+  "attachments": [
+    {
+      "name": "Liguanxi-UAV飞行器BOM表元件清单.xlsx",
+      "url": "https://image.lceda.cn/attachments/2023/8/NuLjoZyrR5HP6q2b3cfqENgQzrkfUY4o92aQEmYJ.xlsx",
+      "original_id": "3d6c3679c69e4c2983536a4c47c9d442"
+    },
+    {
+      "name": "立创电赛：《四轴飞行器Liguanxi-UAV》-飞行演示.mp4",
+      "url": "https://image.lceda.cn/attachments/2023/10/LDJYJDD56fEZJnZ9ivxAq6NUcHbHRO1USUcFCEkk.mp4",
+      "original_id": "084b016a442741a8bf2298559a9b778f"
+    },
+    {
+      "name": "立创电赛：《四轴飞行器Liguanxi-UAV》-匿名上位机软件展示.mp4",
+      "url": "https://image.lceda.cn/attachments/2023/10/Qp5i8gBAoVnr6MAS6FoaopyEBLQx7lj1g5vBPn6G.mp4",
+      "original_id": "52d372450e7d4e3dad35b82f763e7576"
+    },
+    {
+      "name": "LiGuanxi-UAV（2023.10.18气压读取成功无定高开源前备份）.rar",
+      "url": "https://image.lceda.cn/attachments/2023/10/ETrD0zrBXtRpHKLFtTgN0ZJd1DKJDKkEmvrMz1Cz.rar",
+      "original_id": "8993f633b7274fa582464b154c22e487"
+    },
+    {
+      "name": "ANO_TC匿名科创地面站v4.34.rar",
+      "url": "https://image.lceda.cn/attachments/2023/10/JKxUSW2qZ1LNhosXJSfdtnIQKGmzEO8rubPxz10o.rar",
+      "original_id": "699497471a7b46c7b549379f14a2eda9"
+    }
+  ]
+}