forge-vesting — add test verifying cancel_and_claim() is rejected when schedule is paused

[Austinaminu2]

Summary

cancel_and_claim() correctly checks if config.paused { return Err(VestingError::Paused); }. There is no test verifying this rejection. A paused schedule must not be atomically claimed and cancelled — the admin should unpause first to establish a clear vested amount.

Tasks

• Initialize and advance past cliff
• Call pause() as admin
• Call cancel_and_claim() — assert Err(VestingError::Paused)
• Verify no tokens have been transferred
• Verify config.cancelled is still false
• Unpause, then call cancel_and_claim() — assert success

Labels: testing, forge-vesting