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/feaac33200624098bd924a0e381c9314/_urls.json

@@ -0,0 +1,21 @@
+{
+  "detail_url": "https://oshwhub.com/sora380/fei-kong-2024",
+  "cover_url": "https://image.lceda.cn/oshwhub/1f13243e1fc441a89d10b91bcd5ec760.jpg",
+  "attachments": [
+    {
+      "name": "SA380开源版本.zip",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/5c43d2f7ae34460b97f2e060b3104df8.zip",
+      "original_id": "414ca4cb8e004c9487e9b16597c54535"
+    },
+    {
+      "name": "生产护桨的文件.zip",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/3789af6003294183b5d59da327f9f656.zip",
+      "original_id": "764d189afa7e41889882ed35fb62db0b"
+    },
+    {
+      "name": "生产机架的文件.zip",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/da46c46ea28040a29efbdec19062186d.zip",
+      "original_id": "6304374c9c46406a9fa15a00f3b657ce"
+    }
+  ]
+}