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/description.md

@@ -0,0 +1,9 @@
+# 航模遥控器用单通道实现用按键控制选择飞控的8种模式电路
+
+8段按键控制电压输出，等效一个由8个按键控制的电位器或者一个8段开关。
+
+---
+- Source: https://oshwhub.com/baihe6600/dan-tong-dao-shi-xian-yong-an-jian-kong-zhi-xuan-zhai-8-zhong-mu-shi-dian-lu
+- Author: 荒野老白 (baihe6600)
+- License: Public Domain
+- Published: 2022-06-14T01:17:42.000Z