飞控-77: 77 std flight-controller projects ingested

Topic-targeted pull from local listing index (`name OR introduction`
contains 飞控). 79 std hits in oshwhub_listing_full.jsonl, 2 already
crawled, 77 newly fetched.

dev1 (Guangzhou) walltime:
  Step 1 detail scrape ~12s, Step 4 std-source backfill ~80s
  (concurrency=5)
Source completeness: 73/77 with editor source, 4 are upstream
attachments-only (no editor session ever attached, source_documents=[]
is genuine — no editor_version on the SSR page either).

Crawler hardening (crawlers/oshwhub/crawler.py):
- count.{like,star,fork,views} are now `.get(..., 0)` defensive.
  Listing API omits zero-valued fields for some low-activity entries
  (3/77 hit this on first pass, hard-failed with KeyError 'like').
  Affects rank_score, pick_top, and metadata.json metrics block.

License mix: 65% GPL 3.0, 11% Public Domain, 11% MIT, ~6% CC variants.

Transport: dev1 → SG via tar+scp (33 MB, ~3 min over lossy
cross-region link). Bypassed gitea push from dev1 because the same
6.5%-loss link tanks single-stream throughput.

data/raw/oshwhub/21817f8fcf2d4e36b96f8e00c33a5c93/metadata.json

@@ -0,0 +1,53 @@
+{
+  "source": "oshwhub",
+  "source_url": "https://oshwhub.com/JumperShao/m1_mh743_ada_v4",
+  "project_id": "21817f8fcf2d4e36b96f8e00c33a5c93",
+  "title": "m1_mh743_ada_v4",
+  "description_short": "朗宇M1改ArduPilot, MatekH743mini飞控转接板",
+  "description_path": "description.md",
+  "author": {
+    "username": "JumperShao",
+    "display_name": "JumperShao",
+    "user_id": "8c21dccebe594ff98970fc4521981d66"
+  },
+  "license": "GPL 3.0",
+  "tags": [],
+  "created_at": "2022-02-04T01:15:16.000Z",
+  "updated_at": "2022-02-25T01:30:27.000Z",
+  "published_at": "2022-02-25T01:30:27.000Z",
+  "crawled_at": "2026-04-30T10:57:07.010231+00:00",
+  "metrics": {
+    "likes": 0,
+    "stars": 1,
+    "forks": 2,
+    "views": 1074,
+    "watch": 0,
+    "comments": 0
+  },
+  "cover": {
+    "url": "https://image.lceda.cn/pullimage/haHqGHCALFdesiNBAPqK4v0aqj32O5SyRmxiDvtC.jpeg",
+    "path": null
+  },
+  "files": [],
+  "raw_fields": {
+    "path": "JumperShao/m1_mh743_ada_v4",
+    "grade": 0,
+    "origin": "std",
+    "public": true,
+    "publish": true,
+    "skipped_files": []
+  },
+  "source_format": "easyeda-std",
+  "source_path": "source/",
+  "source_documents": [
+    {
+      "doc_uuid": "e7d66b9e02b9457083f9ab563784a0f2",
+      "docType": 3,
+      "master": "d158f8681c8943c9b7ae993a21d3573b",
+      "path": "source/e7d66b9e02b9457083f9ab563784a0f2.json",
+      "size": 567060,
+      "sha256": "d5a7011ab048898e86cff342f8ea21f640beb0878917ca5fdae64938f97662a9"
+    }
+  ],
+  "editor_version": "6.4.31"
+}