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/48919432e4dc44d3b59ccc4a3ed4367a/_urls.json

@@ -0,0 +1,31 @@
+{
+  "detail_url": "https://oshwhub.com/cai20070410/at32-20-kong-aio-fei-kong-ban",
+  "cover_url": "https://image.lceda.cn/oshwhub/e5c49e76db2546798300e6244aeef13f.jpg",
+  "attachments": [
+    {
+      "name": "Artery_ISP_Programmer_V2.0.07.rar",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/c5441f0db3814a85a30446e4036e52a7.rar",
+      "original_id": "4ed9a16aa2d1445cba4ef5f271ee14db"
+    },
+    {
+      "name": "VirtualCOM_DriverInstall.exe",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/99513a6978e2494caf9a12816bd0b234.exe",
+      "original_id": "311e65a0e98a41269b3f7c4a3f5f6fcb"
+    },
+    {
+      "name": "ATbetaflight_4.3.4_NEUTRONRCF435MINI_aef80d1b1.hex",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/0cc37bc53ace40ce9edfa7827a5db294.hex",
+      "original_id": "951ae29c952f4bdd8056830a949cfda8"
+    },
+    {
+      "name": "先看我！常见问题.docx",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/bf3b7d5b744345c890ddecfa1bf08ada.docx",
+      "original_id": "a5b5a1c74c654e64890ba5c7a680f096"
+    },
+    {
+      "name": "PCB_AT32 20孔aio飞控板V1.4焊接辅助工具.html",
+      "url": "https://image.lceda.cn/oshwhub/project/attachments/6bab4dfc124f4561ba9ed30ccf2d32e6.html",
+      "original_id": "daffe66b61a94a478852ee9c4152a4c1"
+    }
+  ]
+}