fix(turnero): route incoming messages by phone_number_id and fix WhatsAppService canal

- WhatsAppService($canal): when 'turnero', swaps phoneNumberId to whatsapp_phone_number_id_turnero
  so outgoing messages actually go from the turnero number (not the main bot)
- webhook.php: reads metadata.phone_number_id from the payload and compares it to
  whatsapp_phone_number_id_turnero; if it matches, saves canal='turnero' and skips bot processing
- Previously all incoming messages had canal=NULL/bot so Chat Turnero never saw them,
  and all outgoing messages from Chat Turnero were sent via the wrong (main bot) number

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

api/webhook.php

@@ -98,6 +98,11 @@ class WhatsAppWebhook {
     }
     
     private function processconversations($value) {
+        // Detectar si este mensaje llegó al número turnero
+        $receivingPhoneId = $value['metadata']['phone_number_id'] ?? null;
+        $turneroPhoneId   = getConfigFromDB('whatsapp_phone_number_id_turnero', '');
+        $isTurnero = $receivingPhoneId && $turneroPhoneId && ($receivingPhoneId === $turneroPhoneId);
+
         // Aceptar tanto payloads con 'conversations' como con 'messages' (WhatsApp varía según la integración)
         $items = [];
         if (isset($value['conversations']) && is_array($value['conversations'])) {
@@ -299,7 +304,8 @@ class WhatsAppWebhook {
                 'content' => $messageText,
                 'media_url' => $mediaUrl,
                 'status' => 'received',
-                'is_read' => 0
+                'is_read' => 0,
+                'canal' => $isTurnero ? 'turnero' : 'bot',
             ];
 
             // Guardar whatsapp_media_id si el mediaUrl es un ID numérico de WhatsApp
@@ -413,11 +419,13 @@ class WhatsAppWebhook {
                 'timestamp' => date('Y-m-d H:i:s')
             ]);
             
-            // Procesar con bot (protección contra excepciones externas)
-            try {
-                $this->botService->processMessage($user, $messageText, $messageType);
-            } catch (Exception $e) {
-                error_log("Bot processing failed: " . $e->getMessage());
+            // Procesar con bot solo si el mensaje llegó al número principal
+            if (!$isTurnero) {
+                try {
+                    $this->botService->processMessage($user, $messageText, $messageType);
+                } catch (Exception $e) {
+                    error_log("Bot processing failed: " . $e->getMessage());
+                }
             }
         }