feat(webhook): persist incoming provider messages

internal/handler/webhook/twilio_webhook.go

@@ -27,6 +27,7 @@ import (
 type TwilioWebhookHandler struct {
 	twilioWebhook *twiliochannel.WebhookHandler
 	db            *gorm.DB
+	persister     *IncomingPersister
 }
 
 // NewTwilioWebhookHandler creates a Twilio SMS webhook handler for Gin integration.
@@ -34,6 +35,7 @@ func NewTwilioWebhookHandler(twilioWebhook *twiliochannel.WebhookHandler, db *go
 	return &TwilioWebhookHandler{
 		twilioWebhook: twilioWebhook,
 		db:            db,
+		persister:     NewIncomingPersister(db),
 	}
 }
 
@@ -54,9 +56,18 @@ func (h *TwilioWebhookHandler) HandleTwilioInboundSMS(c *gin.Context) {
 		return
 	}
 
-	// Dispatch to the channel-level webhook handler
-	// Twilio expects a TwiML XML response, not JSON
-	h.twilioWebhook.HandleInboundSMS(c.Writer, c.Request, inbox)
+	incomingMsg, err := h.twilioWebhook.ProcessInboundSMS(c.Request, inbox)
+	if err != nil {
+		applogger.L().Errorf("Twilio webhook: process inbound SMS failed for inbox %d: %v", inbox.ID, err)
+		c.Data(http.StatusOK, "application/xml", []byte("<Response></Response>"))
+		return
+	}
+	if incomingMsg != nil {
+		if _, persistErr := h.persister.PersistIncoming(c.Request.Context(), inbox, incomingMsg); persistErr != nil {
+			applogger.L().Errorf("Twilio webhook: persist inbound SMS failed for inbox %d source_id=%s: %v", inbox.ID, incomingMsg.SourceID, persistErr)
+		}
+	}
+	c.Data(http.StatusOK, "application/xml", []byte("<Response></Response>"))
 }
 
 // HandleTwilioDeliveryStatus processes a Twilio delivery status callback.