Serialize binary bytea cols into hex/base64 (#537)

- Adds binary serialization into hex/base64
- Default codec is base64
- Codec can be changed via `--binary-codec` CLI option

pkg/command/options.go

@@ -42,6 +42,7 @@ type Options struct {
 	ConnectionIdleTimeout        int    `long:"idle-timeout" description:"Set connection idle timeout in minutes" default:"180"`
 	Cors                         bool   `long:"cors" description:"Enable Cross-Origin Resource Sharing (CORS)"`
 	CorsOrigin                   string `long:"cors-origin" description:"Allowed CORS origins" default:"*"`
+	BinaryCodec                  string `long:"binary-codec" description:"Codec for binary data serialization"`
 }
 
 var Opts Options