Introduces legacy routes for Minecraft skins and capes to support older endpoints. Enhances error handling in sessionsRepository for missing skins/capes, adds getActiveSkin and getActiveCape to sessionsService, and improves error logging in server.js.
Introduces legacy endpoints for login, joinserver, and checkserver, along with their input validation schemas. Updates sessionsService with joinLegacyServer to support legacy session handling. This enables compatibility with legacy clients requiring these authentication flows.