Add comprehensive API documentation for ThrillWiki integration and features

- Introduced Next.js integration guide for ThrillWiki API, detailing authentication, core domain APIs, data structures, and implementation patterns.
- Documented the migration to Rich Choice Objects, highlighting changes for frontend developers and enhanced metadata availability.
- Fixed the missing `get_by_slug` method in the Ride model, ensuring proper functionality of ride detail endpoints.
- Created a test script to verify manufacturer syncing with ride models, ensuring data integrity across related models.

backend/apps/api/v1/serializers/other.py

@@ -9,6 +9,8 @@ from rest_framework import serializers
 from drf_spectacular.utils import (
     extend_schema_field,
 )
+from .shared import ModelChoices
+from apps.core.choices.serializers import RichChoiceFieldSerializer
 
 
 # === STATISTICS SERIALIZERS ===
@@ -90,7 +92,10 @@ class ParkReviewOutputSerializer(serializers.Serializer):
 class HealthCheckOutputSerializer(serializers.Serializer):
     """Output serializer for health check responses."""
 
-    status = serializers.ChoiceField(choices=["healthy", "unhealthy"])
+    status = RichChoiceFieldSerializer(
+        choice_group="health_statuses",
+        domain="core"
+    )
     timestamp = serializers.DateTimeField()
     version = serializers.CharField()
     environment = serializers.CharField()
@@ -111,6 +116,9 @@ class PerformanceMetricsOutputSerializer(serializers.Serializer):
 class SimpleHealthOutputSerializer(serializers.Serializer):
     """Output serializer for simple health check."""
 
-    status = serializers.ChoiceField(choices=["ok", "error"])
+    status = RichChoiceFieldSerializer(
+        choice_group="simple_health_statuses",
+        domain="core"
+    )
     timestamp = serializers.DateTimeField()
     error = serializers.CharField(required=False)