feat: initialize bangwen recruitment aggregation and search engine

- Rust core engine with HTTP ingestion gateway, hybrid search, and white-box resume matching
- Python edge collectors supporting declarative TOML and specialized adapters
- PostgreSQL schema migrations with pgvector embedding support
- Hardened security controls: strict CSP, terminal sanitization, and input boundary validation
- Multi-service container orchestration with dedicated non-root execution

tests/fixtures/test_repost.json

@@ -0,0 +1,27 @@
+{
+  "protocol_version": "bangwen/v1",
+  "source_id": "yn.ynrsksw.special8",
+  "batch_id": "batch-rsksw-002",
+  "collector": {
+    "name": "ynrsksw_worker",
+    "runtime": "python/3.12",
+    "auth_status": "authenticated",
+    "duration_ms": 280
+  },
+  "items": [
+    {
+      "url": "https://hrss.yn.gov.cn/ynrsksw/Special8/notice_9901.html",
+      "title": "云南省省属事业单位公开招聘工作人员公告（云南人事考试网转）",
+      "kind": "招聘",
+      "employer": "云南省人力资源和社会保障厅",
+      "employer_type": "事业单位",
+      "published_at": "2026-10-23",
+      "apply_start": "2026-10-25T09:00:00Z",
+      "apply_end": "2026-11-10T18:00:00Z",
+      "region_hint": "云南省昆明市",
+      "body_text": "为满足省属事业单位用人需求，根据《事业单位公开招聘人员暂行规定》等相关文件精神，现面向社会公开招聘工作人员。本次招聘坚持德才兼备、以德为先的选人用人标准，坚持公开、平等、竞争、择优的原则，严格遵守回避制度和保密规定。凡符合招聘条件者均可报考，欢迎广大优秀人才来滇工作。",
+      "attachments": [],
+      "positions": []
+    }
+  ]
+}