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/aae761ed020849a39161569468190dd8/_urls.json

@@ -0,0 +1,11 @@
+{
+  "detail_url": "https://oshwhub.com/baihe6600/dan-tong-dao-shi-xian-yong-an-jian-kong-zhi-xuan-zhai-8-zhong-mu-shi-dian-lu",
+  "cover_url": "https://image.lceda.cn/pullimage/cfNDK9dM4O417QHXiP2BTBt8816AGVbcWRgzp6HQ.jpeg",
+  "attachments": [
+    {
+      "name": "单通道实现用按键控制选择8种模式电路+PCB+固件（20201012）.rar",
+      "url": "https://image.lceda.cn/attachments/2022/4/IubtM0XpL7AJ7SNNnTq246UHKKN4RpLcH3y8h0Bk.rar",
+      "original_id": "5f6d135dcab34794ac656f391fc11206"
+    }
+  ]
+}