Add sessions association and related methods, update tests and models- Added has_many :sessions with dependent destroy to User

• Added del_sessions method and invoked in destroy
• Updated test suites (created a buncha them) and model validations for sessions, addresses, admin actions, and other features

Added base_cost to product for better checkout workflow
Fixed issue where you couldn’t get free charm (if charm was set to free it wouldn’t let you redeem it)
Fixed product delete and added force delete button
Refactor prize order deletion to clear charm slot FK references
Refactor charm slot reuse, add Redis service and DB name updatesRename Postgres DB to metroid_mania_test, add Redis container, adjust environment variables, refactor Order model to reuse existing empty charm slots with capacity limits, simplify loadout view logic, and add tests for slot reuse and header loadout.
Fix Guide Styling