feat(boc): v1.0 - Complete Business Operations Center

- Go backend API with full CRUD for all modules
- Rust analytics service with parallel processing
- C runtime with POSIX shared memory IPC
- PostgreSQL schema with 30+ tables
- Redis cache, Kafka event streaming
- WebSocket hub, automation engine
- PDF generation, Resend email integration
- JWT auth, multi-tenant
- Docker Compose deployment
- Nginx reverse proxy

Refs: BOC-001

backend/middleware/cors.go

@@ -0,0 +1,37 @@
+package middleware
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/rs/zerolog"
+)
+
+func CORS(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+
+		if r.Method == "OPTIONS" {
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+
+		next.ServeHTTP(w, r)
+	})
+}
+
+func Logger(logger zerolog.Logger) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			start := time.Now()
+			next.ServeHTTP(w, r)
+			logger.Info().
+				Str("method", r.Method).
+				Str("path", r.URL.Path).
+				Dur("duration", time.Since(start)).
+				Msg("request")
+		})
+	}
+}