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/5525d220614d4bc391d7ec21f7b47dca/_urls.json

@@ -0,0 +1,26 @@
+{
+  "detail_url": "https://oshwhub.com/cai20070410/at32f437-fei-kong",
+  "cover_url": "https://image.lceda.cn/pullimage/GzW3HwP8Zuv2GF737D8pq3AK12lbVzMwEB9aqJOW.jpeg",
+  "attachments": [
+    {
+      "name": "at32f437.bin",
+      "url": "https://image.lceda.cn/attachments/2023/6/vkYDGiL4Et4BEf28bQUFo2yy0AgdolThU37G8pD6.bin",
+      "original_id": "34e4627f590741fc9fe65abef4763bf9"
+    },
+    {
+      "name": "betaflight_4.3.2_EMSRPROTO2_212aa64.hex",
+      "url": "https://image.lceda.cn/attachments/2023/6/1tFee9L9gYYO1MnIu682oV6IrlMuvuleuTS6gP0b.txt",
+      "original_id": "df2907390f73415c9de053d41eda1242"
+    },
+    {
+      "name": "Artery_ISP_Programmer_V2.0.07.rar",
+      "url": "https://image.lceda.cn/attachments/2023/6/tbkFl4DiXEwQTF1PxkuN04UZP3zCA26rbzFmiDgH.rar",
+      "original_id": "92fb32e16c934193a48dbcbb6bfc582b"
+    },
+    {
+      "name": "inav_6.1.1_SAGEATF4.hex",
+      "url": "https://image.lceda.cn/attachments/2023/6/uY00hYDbYV1fY45K5c4eI7mbyFLKqmboKHVT5IWs.txt",
+      "original_id": "b1f33ee7bfdc47e4927bc1e14a3a4b04"
+    }
+  ]
+}