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/sample_resume.json

@@ -0,0 +1,9 @@
+{
+  "name": "张三",
+  "education": "本科",
+  "major": "软件工程",
+  "birth_year": 1996,
+  "target_cities": ["玉溪", "昆明"],
+  "skills": ["Linux", "运维", "生产环境"],
+  "summary": "计算机专业毕业，具备多年 Linux 运维和高可用生产环境维护经验。"
+}