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/78dd4bf7e1c94c1e82b34c5509874cc6/description.md

@@ -0,0 +1,10 @@
+# P900数传电台
+
+P900数传电台，可作为无人机飞控的数传，支持pixhawk。附件包含两块板子，天空端和地面端，天空端5V供电，地面端7-28V供电。使用915Mhz天线。
+仅供学习参考使用。
+
+---
+- Source: https://oshwhub.com/yang_xw0011/P900shuo-zhuan-dian-tai
+- Author: 自动挖掘机 (yang_xw0011)
+- License: MIT
+- Published: 2022-10-12T05:23:18.000Z