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/6d3086f16a3d4f01a45f227b562c7395/description.md

@@ -0,0 +1,9 @@
+# 空心杯AIO飞控（stm32f103c8t6主控）
+
+修改https://oshwhub.com/death/naze32-kong-xin-bei-si-zhou大佬的排版能适配各种轴距的四轴但要自备机架和接收机
+
+---
+- Source: https://oshwhub.com/hechuzhiyou/kong-xin-bei-AIOfei-kong-stm32f1
+- Author: hechuzhiyou (hechuzhiyou)
+- License: GPL 3.0
+- Published: 2022-01-29T09:37:48.000Z