docs: add research domains and resource registry

- add local external resources registry
- add research domain contract and per-repository research domains
- add raw fact snapshot governance and validation scripts

Validation:
- make test
- git diff --check HEAD~1..HEAD

Note:
- welcome workflow failed because its action input names are stale; core content CI passed.

docs/research/filipecalegario-awesome-vibe-coding/domain.yml

@@ -0,0 +1,41 @@
+version: 1
+repo:
+  name: filipecalegario/awesome-vibe-coding
+  source_name: filipecalegario/awesome-vibe-coding
+  url: https://github.com/filipecalegario/awesome-vibe-coding
+research:
+  domain_id: filipecalegario-awesome-vibe-coding
+  domain_name: filipecalegario/awesome-vibe-coding 研究域
+  primary_direction: ecosystem-index
+  role: 国际 Vibe Coding 索引
+  priority: 2
+  why_study: 适合追踪概念、工具和资料生态，不适合作为单一学习主线。
+github_observed:
+  observed_at: '2026-07-03'
+  source: gh repo view
+  stars: 4848
+  forks: 580
+  archived: false
+  language: null
+  license: cc0-1.0
+  default_branch: main
+  pushed_at: '2026-04-16T01:34:11Z'
+  updated_at: '2026-07-02T16:17:40Z'
+  latest_release: null
+  homepage: ''
+  topics:
+  - ai-agent
+  - ai-agents
+  - ai-coding-assistant
+  - ai-coding-tools
+  - cursor
+  - lovable
+  - vibe-coding
+  - awesome
+  - awesome-list
+source_evidence:
+  file: ChatGPT-中文Vibe Coding仓库 (2).md
+  line: 49
+maintenance:
+  fact_policy: GitHub 动态字段只代表 observed_at 当日快照，更新结论前必须重新核验。
+  split_policy: 本目录已经是一等研究域；更深分析放入本目录新增文档。