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/dce335ad0d0c43cfba93bf8d2a142acc/_urls.json

@@ -0,0 +1,16 @@
+{
+  "detail_url": "https://oshwhub.com/airbus15/matek-f405-wse-hua-xiang-ji-fei-kong-v1-0",
+  "cover_url": "https://image.lceda.cn/oshwhub/pullImage/b2d062ca676246f1a921ec9890f5664c.jpg",
+  "attachments": [
+    {
+      "name": "MATEK F405 WING AP 4.5.0.hex",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/76ccfb5c4f9d4409b0c2ff00a697bf25.hex",
+      "original_id": "4bb1deb710104f04a46d26ab5034ffc3"
+    },
+    {
+      "name": "inav_7.0.0_MATEKF405SE.hex",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/2942544e64f54343932fa57df9bec352.hex",
+      "original_id": "f6c61cbc1b094d0db9ff7ff04a9d1c70"
+    }
+  ]
+}