Replaced custom repository logic with Jakarta Data interfaces to reduce boilerplate and enhance compile-time query validation. Removed `AbstractRepository` and introduced `TransactionRunner` for consistent transactional support. Updated all repository facades to delegate query operations to generated interfaces while retaining the same API, ensuring backward compatibility. Added dependencies for `jakarta.data-api` and Hibernate's `hibernate-processor` for annotation-based query generation. Verified functional parity and improved testability across the repository layer.
Eliminated the static `JpaUtils` utility and transitioned to explicit repository management for improved modularity and testability. Updated `GuildService`, `TaskManagerImpl`, and related classes to use dependency-injected repositories. Simplified configuration by aligning repository definitions with existing service patterns and ensuring proper session handling through `SessionManager`. Verified that all affected components function as expected after refactoring.
Replaced Gson and org.json usage across the codebase with a unified Jackson-based implementation through a shared `Json` utility. Updated all JSON serialization and deserialization logic (`GsonJsonMapper`, HTTP client, task persistence, command handling, tests) to use Jackson's `ObjectMapper`. Removed the outdated dependencies from `pom.xml` and verified symmetry in payload serialization.
Updated the dependency to Javalin v7.2.3 and refactored route registration to use the new `RoutesConfig` API. Adjusted `GuildRoutes`, `ActionRoutes`, and `WebApi` to align with updated conventions and centralized route definitions. Improved modularity, reduced redundancy, and ensured backward compatibility by migrating exception and error handler logic. Updated tests to comply with the refactored APIs and structure.
Replaced the bot's audio handling system by removing Lavaplayer dependencies and migrating to a Lavalink v4 node. Updated `MusicManager`, `TrackScheduler`, and related classes to utilize the `LavalinkClient`. Refactored playlist and track loading logic, task integrations, and event dispatch to integrate with the remote node. Deprecated the custom Udio source, preserving references for a future plugin port. Documented configuration and deployment details for the new audio architecture.
Replaced the existing HttpServer implementation and associated handler classes (`AbstractHandler`, `ActionHandler`, `GuildHandler`, `RootHandler`) with a Javalin-based routing system. Improved modularity by introducing `ActionRoutes` and `GuildRoutes` for route definitions, and centralized JSON mapping using `GsonJsonMapper`. Simplified caching via the new `ResponseCache` utility, updated `WebModule` for cleaner timeout handling, and extended test coverage for API endpoints.
Refactored scheduled tasks and moved them to a dedicated `scheduled` package. Replaced the legacy `ScheduledTaskManager` and `ScheduledTask` definitions with a redesigned architecture to improve maintainability. Updated related classes and configurations to adopt the new structure.