Fix: Add -admin.grpc flag to worker for explicit gRPC port (#7926) (#7927)

* Fix: Add -admin.grpc flag to worker for explicit gRPC port configuration

* Fix(helm): Add adminGrpcServer to worker configuration

* Refactor: Support host:port.grpcPort address format, revert -admin.grpc flag

* Helm: Conditionally append grpcPort to worker admin address

* weed/admin: fix "send on closed channel" panic in worker gRPC server

Make unregisterWorker connection-aware to prevent closing channels
belonging to newer connections.

* weed/worker: improve gRPC client stability and logging

- Fix goroutine leak in reconnection logic
- Refactor reconnection loop to exit on success and prevent busy-waiting
- Add session identification and enhanced logging to client handlers
- Use constant for internal reset action and remove unused variables

* weed/worker: fix worker state initialization and add lifecycle logs

- Revert workerState to use running boolean correctly
- Prevent handleStart failing by checking running state instead of startTime
- Add more detailed logs for worker startup events

weed/pb/grpc_client_server.go

@@ -257,6 +257,15 @@ func hostAndPort(address string) (host string, port uint64, err error) {
 	if colonIndex < 0 {
 		return "", 0, fmt.Errorf("server should have hostname:port format: %v", address)
 	}
+	dotIndex := strings.LastIndex(address, ".")
+	if dotIndex > colonIndex {
+		// port format is "port.grpcPort"
+		port, err = strconv.ParseUint(address[colonIndex+1:dotIndex], 10, 64)
+		if err != nil {
+			return "", 0, fmt.Errorf("server port parse error: %w", err)
+		}
+		return address[:colonIndex], port, err
+	}
 	port, err = strconv.ParseUint(address[colonIndex+1:], 10, 64)
 	if err != nil {
 		return "", 0, fmt.Errorf("server port parse error: %w", err)
@@ -267,6 +276,19 @@ func hostAndPort(address string) (host string, port uint64, err error) {
 
 func ServerToGrpcAddress(server string) (serverGrpcAddress string) {
 
+	colonIndex := strings.LastIndex(server, ":")
+	if colonIndex >= 0 {
+		if dotIndex := strings.LastIndex(server, "."); dotIndex > colonIndex {
+			// port format is "port.grpcPort"
+			// return the host:grpcPort
+			host := server[:colonIndex]
+			grpcPort := server[dotIndex+1:]
+			if _, err := strconv.ParseUint(grpcPort, 10, 64); err == nil {
+				return util.JoinHostPort(host, int(0+util.ParseInt(grpcPort, 0)))
+			}
+		}
+	}
+
 	host, port, parseErr := hostAndPort(server)
 	if parseErr != nil {
 		glog.Fatalf("server address %s parse error: %v", server, parseErr)