feat: Add manual email sending workflow and related database changes

- Implemented a new n8n workflow for manual email sending, including webhook trigger, order data fetching, email building, and sending.
- Added logic to format email content with customer and order details.
- Introduced new columns in the sales_orders table to track email sending status.
- Updated database functions to handle new rental types and email status.
- Created new RPCs for updating email status and retrieving email details for sales orders.

docker-compose.local.yml

@@ -25,6 +25,8 @@ services:
       - ./supabase/migrations/08-backend-pricing-and-security.sql:/sql/08-backend-pricing-and-security.sql:ro
       - ./supabase/migrations/09-site-settings.sql:/sql/09-site-settings.sql:ro
       - ./supabase/migrations/10-mietvertrag-workflow.sql:/sql/10-mietvertrag-workflow.sql:ro
+      - ./supabase/migrations/11-consolidate-km-rental.sql:/sql/11-consolidate-km-rental.sql:ro
+      - ./supabase/migrations/12-email-sent-and-more.sql:/sql/12-email-sent-and-more.sql:ro
 
   kong:
     volumes: