fix(email): adiciona tratamento de erros no envio de e-mails de automacao

- Adiciona try-catch para cada envio individual
- Registra logs detalhados de sucesso e falha por destinatario
- Retorna informacao sobre quantos e-mails falharam
- Imprime resumo de envios no console para debug

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

convex/ticketNotifications.ts

@@ -535,10 +535,27 @@ export const sendAutomationEmail = action({
       ctaUrl: emailProps.ctaUrl,
     })
 
+    const results: Array<{ recipient: string; sent: boolean; error?: string }> = []
+
     for (const recipient of recipients) {
-      await sendSmtpMail(smtp, recipient, subject, html)
+      try {
+        await sendSmtpMail(smtp, recipient, subject, html)
+        results.push({ recipient, sent: true })
+        console.log(`[automation-email] Enviado para ${recipient}`)
+      } catch (error) {
+        const errorMessage = error instanceof Error ? error.message : String(error)
+        results.push({ recipient, sent: false, error: errorMessage })
+        console.error(`[automation-email] Falha ao enviar para ${recipient}: ${errorMessage}`)
+      }
     }
 
-    return { ok: true, sent: recipients.length }
+    const sent = results.filter((r) => r.sent).length
+    const failed = results.filter((r) => !r.sent).length
+
+    if (failed > 0) {
+      console.error(`[automation-email] Resumo: ${sent}/${recipients.length} enviados, ${failed} falhas`)
+    }
+
+    return { ok: sent > 0, sent, failed, results }
   },
 })