fix: add startup timeout guard to prevent indefinite hangs

Add a 10-second timeout mechanism during application initialization. If initialization
fails to complete within the timeout window, the application logs a fatal error and exits.
This prevents the proxy from becoming unresponsive during startup due to blocking operations
in parallel initialization tasks (DNS providers, icon cache, system info poller, middleware
loading, Docker client, API server, debug server, config watcher).

The timeout guard uses a background goroutine that listens for either a completion signal
(via closing the done channel) or the timeout expiration, providing a safety net for
long-running or blocked initialization scenarios.

cmd/main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"os"
 	"sync"
+	"time"
 
 	"github.com/rs/zerolog/log"
 	"github.com/yusing/godoxy/internal/api"
@@ -32,6 +33,16 @@ func parallel(fns ...func()) {
 }
 
 func main() {
+	done := make(chan struct{}, 1)
+	go func() {
+		select {
+		case <-done:
+			return
+		case <-time.After(time.Second * 10):
+			log.Fatal().Msgf("timeout waiting for initialization to complete, exiting...")
+		}
+	}()
+
 	initProfiling()
 
 	logging.InitLogger(os.Stderr, memlogger.GetMemLogger())
@@ -86,6 +97,8 @@ func main() {
 	uptime.Poller.Start()
 	config.WatchChanges()
 
+	close(done)
+
 	task.WaitExit(config.Value().TimeoutShutdown)
 }