Clean up the codebase by removing unused and deprecated unread count functionality in `ConversationCache` and associated Redis key generators. This follows the transition to sequence-based unread calculation. - Remove `IncrementUnread`, `ClearUnread`, `GetUnreadCountFromHash`, `GetAllUnreadCounts`, and `GetTotalUnread` from `ConversationCache`. - Remove `PrefixUnreadHash` and `PrefixUnreadTotal` constants and `UnreadHashKey`/`UnreadTotalKey` helper functions. - Remove unused `isValidContentType` helper in `MessageHandler`.
8.1 KiB
8.1 KiB