Initial commit: Orchard content-addressable storage system

- Go server with Gin framework
- PostgreSQL for metadata storage
- MinIO/S3 for artifact storage with SHA256 content addressing
- REST API for grove/tree/fruit operations
- Web UI for managing artifacts
- Docker Compose setup for local development

cmd/orchard-server/main.go

@@ -0,0 +1,85 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/bsf/orchard/internal/api"
+	"github.com/bsf/orchard/internal/config"
+	"github.com/bsf/orchard/internal/storage"
+	"go.uber.org/zap"
+)
+
+func main() {
+	// Initialize logger
+	logger, err := zap.NewProduction()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to create logger: %v\n", err)
+		os.Exit(1)
+	}
+	defer logger.Sync()
+
+	// Load configuration
+	cfg, err := config.Load()
+	if err != nil {
+		logger.Fatal("failed to load configuration", zap.Error(err))
+	}
+
+	// Initialize database
+	db, err := storage.NewDatabase(&cfg.Database)
+	if err != nil {
+		logger.Fatal("failed to connect to database", zap.Error(err))
+	}
+	defer db.Close()
+
+	// Initialize S3 storage
+	s3, err := storage.NewS3Storage(&cfg.S3)
+	if err != nil {
+		logger.Fatal("failed to initialize S3 storage", zap.Error(err))
+	}
+
+	// Setup router
+	router := api.SetupRouter(db, s3, logger)
+
+	// Create HTTP server
+	addr := fmt.Sprintf("%s:%d", cfg.Server.Host, cfg.Server.Port)
+	srv := &http.Server{
+		Addr:         addr,
+		Handler:      router,
+		ReadTimeout:  30 * time.Second,
+		WriteTimeout: 30 * time.Second,
+		IdleTimeout:  60 * time.Second,
+	}
+
+	// Start server in goroutine
+	go func() {
+		logger.Info("starting Orchard server",
+			zap.String("address", addr),
+		)
+		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			logger.Fatal("server failed", zap.Error(err))
+		}
+	}()
+
+	// Wait for interrupt signal
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+
+	logger.Info("shutting down server...")
+
+	// Graceful shutdown with timeout
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	if err := srv.Shutdown(ctx); err != nil {
+		logger.Fatal("server forced to shutdown", zap.Error(err))
+	}
+
+	logger.Info("server stopped")
+}