Add REST API for exposing player activity data by @Copilot in #62
Fix session time loss on server restart by @Copilot in #63
Fix data loss from broken session references and null handling failures by @Copilot in #67
Optimize top algorithm from O(n²) to O(n log n) complexity with generic architecture, comprehensive unit tests and minimal CI validation - fixes #44 by @Copilot in #58