feat: implement webhook notification system and integrate into queue manager

internal/notify/notify.go

@@ -0,0 +1,54 @@
+package notify
+
+import (
+	"bytes"
+	"encoding/json"
+	"log"
+	"net/http"
+	"time"
+)
+
+type WebhookPayload struct {
+	Title   string `json:"title"`
+	Message string `json:"message"`
+	Time    string `json:"time"`
+}
+
+func SendWebhook(url, title, message string) {
+	if url == "" {
+		return
+	}
+
+	payload := WebhookPayload{
+		Title:   title,
+		Message: message,
+		Time:    time.Now().Format(time.RFC3339),
+	}
+
+	data, err := json.Marshal(payload)
+	if err != nil {
+		log.Printf("Failed to marshal webhook payload: %v", err)
+		return
+	}
+
+	go func() {
+		req, err := http.NewRequest("POST", url, bytes.NewBuffer(data))
+		if err != nil {
+			log.Printf("Failed to create webhook request: %v", err)
+			return
+		}
+		req.Header.Set("Content-Type", "application/json")
+
+		client := &http.Client{Timeout: 10 * time.Second}
+		resp, err := client.Do(req)
+		if err != nil {
+			log.Printf("Failed to send webhook: %v", err)
+			return
+		}
+		defer resp.Body.Close()
+
+		if resp.StatusCode >= 400 {
+			log.Printf("Webhook returned error status: %d", resp.StatusCode)
+		}
+	}()
+}