refactor: Extract alerts functionality to dedicated AlertsServiceClient

Moved alert-related methods from ProcurementServiceClient to a new
dedicated AlertsServiceClient for better separation of concerns.

Changes:
- Created shared/clients/alerts_client.py:
  * get_alerts_summary() - Alert counts by severity/status
  * get_critical_alerts() - Filtered list of urgent alerts
  * get_alerts_by_severity() - Filter by any severity level
  * get_alert_by_id() - Get specific alert details
  * Includes severity mapping (critical → urgent)

- Updated shared/clients/__init__.py:
  * Added AlertsServiceClient import/export
  * Added get_alerts_client() factory function

- Updated procurement_client.py:
  * Removed get_critical_alerts() method
  * Removed get_alerts_summary() method
  * Kept only procurement-specific methods

- Updated dashboard.py:
  * Import and initialize alerts_client
  * Use alerts_client for alert operations
  * Use procurement_client only for procurement operations

Benefits:
- Better separation of concerns
- Alerts logically grouped with alert_processor service
- Cleaner, more maintainable service client architecture
- Each client maps to its domain service

shared/clients/__init__.py

@@ -17,6 +17,7 @@ from .recipes_client import RecipesServiceClient
 from .suppliers_client import SuppliersServiceClient
 from .tenant_client import TenantServiceClient
 from .ai_insights_client import AIInsightsClient
+from .alerts_client import AlertsServiceClient
 
 # Import config
 from shared.config.base import BaseServiceSettings
@@ -108,12 +109,22 @@ def get_suppliers_client(config: BaseServiceSettings = None, service_name: str =
     """Get or create a suppliers service client"""
     if config is None:
         from app.core.config import settings as config
-    
+
     cache_key = f"suppliers_{service_name}"
     if cache_key not in _client_cache:
         _client_cache[cache_key] = SuppliersServiceClient(config)
     return _client_cache[cache_key]
 
+def get_alerts_client(config: BaseServiceSettings = None, service_name: str = "unknown") -> AlertsServiceClient:
+    """Get or create an alerts service client"""
+    if config is None:
+        from app.core.config import settings as config
+
+    cache_key = f"alerts_{service_name}"
+    if cache_key not in _client_cache:
+        _client_cache[cache_key] = AlertsServiceClient(config, service_name)
+    return _client_cache[cache_key]
+
 
 class ServiceClients:
     """Convenient wrapper for all service clients"""
@@ -223,6 +234,7 @@ __all__ = [
     'ProductionServiceClient',
     'RecipesServiceClient',
     'SuppliersServiceClient',
+    'AlertsServiceClient',
     'TenantServiceClient',
     'ServiceClients',
     'get_training_client',
@@ -234,5 +246,6 @@ __all__ = [
     'get_production_client',
     'get_recipes_client',
     'get_suppliers_client',
+    'get_alerts_client',
     'get_service_clients'
 ]