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

bin/bangwen

@@ -0,0 +1,3 @@
+#!/bin/sh
+PROJECT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+exec docker compose -f "$PROJECT_DIR/compose.yaml" exec -T core /app/bangwen "$@"