feat: Implement Entity Suggestion Manager and Modal components

- Added EntitySuggestionManager.vue to manage entity suggestions and authentication.
- Created EntitySuggestionModal.vue for displaying suggestions and adding new entities.
- Integrated AuthManager for user authentication within the suggestion modal.
- Enhanced signal handling in start-servers.sh for graceful shutdown of servers.
- Improved server startup script to ensure proper cleanup and responsiveness to termination signals.
- Added documentation for signal handling fixes and usage instructions.

backend/apps/rides/models/rides.py

@@ -1,6 +1,7 @@
 from django.db import models
 from django.utils.text import slugify
 from django.contrib.contenttypes.fields import GenericRelation
+from django.db.models import Avg
 from apps.core.models import TrackedModel
 from .company import Company
 import pghistory
@@ -56,7 +57,11 @@ class RideModel(TrackedModel):
 
 @pghistory.track()
 class Ride(TrackedModel):
-    """Model for individual ride installations at parks"""
+    """Model for individual ride installations at parks
+
+    Note: The average_rating field is denormalized and refreshed by background
+    jobs. Use selectors or annotations for real-time calculations if needed.
+    """
 
     STATUS_CHOICES = [
         ("", "Select status"),