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/d698304c0e8e4d86a0d23045b1e3d5f2/source/manifest.json

@@ -0,0 +1,86 @@
+{
+  "project_uuid": "d698304c0e8e4d86a0d23045b1e3d5f2",
+  "fetched_at": "2026-04-30T10:50:45.306945+00:00",
+  "editor_version": "6.5.46",
+  "documents": [
+    {
+      "doc_uuid": "218fc83f12e742a2b6caee7a536d459f",
+      "docType": 3,
+      "master": "f137b71a452248f18ba06963c0052a74",
+      "path": "source/218fc83f12e742a2b6caee7a536d459f.json",
+      "size": 997072,
+      "sha256": "6e045d4b4f3902554183e31bd9351d2d457d45add6fcec9c8c5655d9dc5ea300"
+    },
+    {
+      "doc_uuid": "75dde71f2e8d45d2a7b722f034dcd87b",
+      "docType": 3,
+      "master": "aadb1aac99a24037912597beb447f943",
+      "path": "source/75dde71f2e8d45d2a7b722f034dcd87b.json",
+      "size": 374824,
+      "sha256": "820dbcf50a39ddddb3b9ff7aca82e34edbd9c8dae8ed9454a11bb582dff83780"
+    }
+  ],
+  "upstream_version_documents": [
+    {
+      "uuid": "218fc83f12e742a2b6caee7a536d459f",
+      "title": "PCB_开源飞控",
+      "description": "",
+      "docType": 3,
+      "master": "f137b71a452248f18ba06963c0052a74",
+      "thumb": "//image.lceda.cn/histories/f137b71a452248f18ba06963c0052a74.png",
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+      "title": "鸡臂&底板",
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+}