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/8394447d1bf7406daf1e58458bfd5262/source/manifest.json

@@ -0,0 +1,149 @@
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+  "fetched_at": "2026-04-30T10:50:35.184866+00:00",
+  "editor_version": "6.4.30",
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+      "size": 1186242,
+      "sha256": "336efeb951b14742645917ba2f394ad372b7b85d32b2215312e09cc43bd0ec3b"
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