fix: Set cipher for filerS3Options in filer.go

Propagate filer encryption intent into the embedded S3 options:

- In `weed/command/filer.go` inside `runFiler()` when `-s3` is enabled:
  - Set `filerS3Options.cipher = f.cipher` before calling `filerS3Options.startS3Server()`.

This ensures:
- `filerS3Options.cipher` is always non-nil in the embedded S3 path
- embedded S3 inherits `-encryptVolumeData` behavior from the filer configuration

weed/command/filer.go

@@ -228,6 +228,7 @@ func runFiler(cmd *Command, args []string) bool {
 	filerAddress := pb.NewServerAddress(*f.ip, *f.port, *f.portGrpc).String()
 	startDelay := time.Duration(2)
 	if *filerStartS3 {
+		filerS3Options.cipher = f.cipher
 		filerS3Options.filer = &filerAddress
 		if *filerS3Options.bindIp == "" {
 			filerS3Options.bindIp = f.bindIp