Fix API token mapping and add extensive debug logging

- Fixed api_token vs mailketing_api_token column mapping
- Added comprehensive debug logging to send-auth-otp
- Added fallback logic for missing settings fields
- Improved error messages for troubleshooting

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

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

check_template.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# Test query to check if template exists and what's in the table
+# Run this in your Supabase SQL editor or via psql
+
+echo "=== Check if template exists ==="
+cat << 'SQL'
+-- Check if template exists
+SELECT key, name, is_active 
+FROM notification_templates 
+WHERE key = 'auth_email_verification';
+
+-- Check all templates
+SELECT key, name, is_active 
+FROM notification_templates 
+ORDER BY key;
+
+-- Check table structure
+\d notification_templates;
+SQL