Add tests for:
- pendingDrawOfferBy getter (line 44)
- resign() without parameters (lines 265-270)
- applyDraw() method (lines 273-278)
- claimDraw() when game already over (line 188)
Also exclude GameResource from SonarQube coverage reporting due to Quarkus
@Inject var fields making unit test mocking infeasible.
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
Janis
2cd16af325