Add consistent -debug and -debug.port flags to commands (#7816)

* Add consistent -debug and -debug.port flags to commands

Add -debug and -debug.port flags to weed master, weed volume, weed s3,
weed mq.broker, and weed filer.sync commands for consistency with
weed filer.

When -debug is enabled, an HTTP server starts on the specified port
(default 6060) serving runtime profiling data at /debug/pprof/.

For mq.broker, replaced the older -port.pprof flag with the new
-debug and -debug.port pattern for consistency.

* Update weed/util/grace/pprof.go

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

weed/command/volume.go

@@ -72,6 +72,8 @@ type VolumeServerOptions struct {
 	hasSlowRead                 *bool
 	readBufferSizeMB            *int
 	ldbTimeout                  *int64
+	debug                       *bool
+	debugPort                   *int
 }
 
 func init() {
@@ -110,6 +112,8 @@ func init() {
 	v.inflightDownloadDataTimeout = cmdVolume.Flag.Duration("inflightDownloadDataTimeout", 60*time.Second, "inflight download data wait timeout of volume servers")
 	v.hasSlowRead = cmdVolume.Flag.Bool("hasSlowRead", true, "<experimental> if true, this prevents slow reads from blocking other requests, but large file read P99 latency will increase.")
 	v.readBufferSizeMB = cmdVolume.Flag.Int("readBufferSizeMB", 4, "<experimental> larger values can optimize query performance but will increase some memory usage,Use with hasSlowRead normally.")
+	v.debug = cmdVolume.Flag.Bool("debug", false, "serves runtime profiling data via pprof on the port specified by -debug.port")
+	v.debugPort = cmdVolume.Flag.Int("debug.port", 6060, "http port for debugging")
 }
 
 var cmdVolume = &Command{
@@ -129,6 +133,9 @@ var (
 )
 
 func runVolume(cmd *Command, args []string) bool {
+	if *v.debug {
+		grace.StartDebugServer(*v.debugPort)
+	}
 
 	util.LoadSecurityConfiguration()