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

Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "bangwen"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+axum = { version = "0.8.9", features = ["macros"] }
+chrono = { version = "0.4.45", features = ["serde"] }
+clap = { version = "4.6.7", features = ["derive", "env"] }
+dotenvy = "0.15.7"
+reqwest = { version = "0.13.5", features = ["json"] }
+serde = { version = "1.0.229", features = ["derive"] }
+serde_json = "1.0.154"
+sha2 = "0.11.1"
+sqlx = { version = "0.9.0", features = ["runtime-tokio", "tls-rustls", "postgres", "chrono", "uuid", "migrate"] }
+tokio = { version = "1.54.1", features = ["rt-multi-thread", "macros", "sync", "io-util", "io-std", "signal"] }
+tracing = "0.1.44"
+tracing-subscriber = { version = "0.3.23", features = ["env-filter"] }