Add POI feature and imporve the overall backend implementation

services/notification/README.md

@@ -15,6 +15,13 @@ The **Notification Service** handles multi-channel communication with bakery own
 - **Multi-Recipient** - Send to individuals or groups
 - **Delivery Tracking** - Monitor delivery status per channel
 
+### Purchase Order Event Processing (🆕)
+- **Automatic Supplier Notifications** - Sends professional HTML emails to suppliers when POs are approved
+- **Event-Driven Architecture** - Consumes procurement events from RabbitMQ
+- **Template Rendering** - Uses Jinja2 templates for professional, branded emails
+- **Fire-and-Forget Processing** - Non-blocking event consumption for high throughput
+- **Email Template Features** - Responsive design, gradient headers, line item tables, mobile-optimized
+
 ### Email Capabilities
 - **HTML Templates** - Professional branded emails
 - **Plain Text Fallback** - Ensure compatibility
@@ -799,11 +806,18 @@ async def send_smart_notification(
 ```
 
 ### Consumed Events
+
+**From Procurement Service (🆕)**
+- **Purchase Order Approved** (`po.approved`) - Automatically sends professional email notification to supplier with PO details, line items, and delivery requirements
+- **Purchase Order Rejected** (`po.rejected`) - Notifies stakeholders when a PO is rejected with reason
+- **Purchase Order Sent** (`po.sent_to_supplier`) - Confirms PO dispatch to supplier
+- **Delivery Received** (`delivery.received`) - Notifies relevant parties when deliveries are received
+
+**From Other Services**
 - **From Alert Processor**: Alert events trigger notifications
 - **From Orchestrator**: Daily summaries, scheduled reports
 - **From Orders**: Order confirmations, delivery updates
 - **From Production**: Quality issue alerts, batch completion
-- **From Procurement**: Stockout warnings, purchase order confirmations
 
 ## Custom Metrics (Prometheus)
 
@@ -915,7 +929,8 @@ python main.py
 - **Auth Service** - User information
 - **PostgreSQL** - Notification history
 - **Redis** - Template caching
-- **RabbitMQ** - Alert consumption
+- **RabbitMQ** - Alert consumption and procurement event processing (🆕)
+- **Procurement Service** - Purchase order events (🆕)
 
 ### Dependents
 - **Alert Processor** - Sends alerts via notifications
@@ -923,6 +938,7 @@ python main.py
 - **Orchestrator** - Daily summaries and reports
 - **All Services** - Critical alerts routing
 - **Frontend Dashboard** - Notification preferences UI
+- **Suppliers** - Receive PO notifications via email (🆕)
 
 ## Business Value for VUE Madrid