Refactor blob storage to use UUID primary keys and implement streaming chunking

- Changed blob table to use ID (UUID) as primary key instead of hash
- Blob records are now created at packing start, enabling immediate chunk associations
- Implemented streaming chunking to process large files without memory exhaustion
- Fixed blob manifest generation to include all referenced blobs
- Updated all foreign key references from blob_hash to blob_id
- Added progress reporting and improved error handling
- Enforced encryption requirement for all blob packing
- Updated tests to use test encryption keys
- Added Cyrillic transliteration to README

internal/s3/module.go

@@ -0,0 +1,40 @@
+package s3
+
+import (
+	"context"
+
+	"git.eeqj.de/sneak/vaultik/internal/config"
+	"go.uber.org/fx"
+)
+
+// Module exports S3 functionality
+var Module = fx.Module("s3",
+	fx.Provide(
+		provideClient,
+	),
+)
+
+func provideClient(lc fx.Lifecycle, cfg *config.Config) (*Client, error) {
+	ctx := context.Background()
+
+	client, err := NewClient(ctx, Config{
+		Endpoint:        cfg.S3.Endpoint,
+		Bucket:          cfg.S3.Bucket,
+		Prefix:          cfg.S3.Prefix,
+		AccessKeyID:     cfg.S3.AccessKeyID,
+		SecretAccessKey: cfg.S3.SecretAccessKey,
+		Region:          cfg.S3.Region,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	lc.Append(fx.Hook{
+		OnStop: func(ctx context.Context) error {
+			// S3 client doesn't need explicit cleanup
+			return nil
+		},
+	})
+
+	return client, nil
+}