fix(whatsapp): add error handling to messages.upsert handler (#695)

Wrap the inner message processing loop in a try-catch to prevent a
single malformed or edge-case message from crashing the entire handler.
Logs the error with remoteJid for debugging while continuing to process
remaining messages in the batch.

Co-authored-by: Ethan M <ethan@nanoclaw.local>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

.claude/skills/add-whatsapp/add/src/channels/whatsapp.ts

@@ -173,6 +173,7 @@ export class WhatsAppChannel implements Channel {
 
     this.sock.ev.on('messages.upsert', async ({ messages }) => {
       for (const msg of messages) {
+        try {
           if (!msg.message) continue;
           // Unwrap container types (viewOnceMessageV2, ephemeralMessage,
           // editedMessage, etc.) so that conversation, extendedTextMessage,
@@ -235,6 +236,12 @@ export class WhatsAppChannel implements Channel {
               is_bot_message: isBotMessage,
             });
           }
+        } catch (err) {
+          logger.error(
+            { err, remoteJid: msg.key?.remoteJid },
+            'Error processing incoming message',
+          );
+        }
       }
     });
   }