refactor(db): update cursor rules and enhance deployment rollback script

- Standardized string formatting in cursor rules for consistency.
- Added a new rollback deployment script to facilitate blue-green deployment strategy.
- Removed outdated seed data files and introduced new rarity mappings for better data management.
- Improved model relationships and query optimizations in various views and admin configurations.
- Enhanced caching strategies across templates to improve performance and reduce load times, including jitter in cache settings for better performance.
- Refactored card-related views and templates to utilize new model fields and relationships.

src/pkmntrade_club/theme/templates/cards/card_detail.html

@@ -5,7 +5,7 @@
     <div class="flex items-center mb-6">
         <div class="ml-4">
             <h1 class="text-3xl font-bold">{{card.name}}</h1>
-            <h2 class="text-lg text-gray-500">{{ card.cardset }} #{{ card.cardnum }} &bull; {{ card.rarity_icon }}</h2>
+            <h2 class="text-lg text-gray-500">{{ card.cardset }} #{{ card.cardnum }} &bull; {{ card.rarity.icon }}</h2>
         </div>
     </div>