feat(TASK-053): implement lockstep netcode over ns_step - #41
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Add LockstepLink/LockstepPeer/LockstepSession under game/simulation/, driving ns_step directly with a fixed INPUT_DELAY of 3 ticks to hide network latency and a checksum comparison every 30 ticks to catch desyncs quickly. Delayed-input over rollback, decoupled send/simulate scheduling, heartbeat-every-tick protocol, bootstrap seeding, and boundary-crossing checksum cadence are recorded in decision-036 and specced in docs/netcode.md.
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Summary
LockstepLink/LockstepPeer/LockstepSessionundergame/simulation/, drivingns_stepdirectly with a fixedINPUT_DELAYof 3 ticks and a checksum comparison every 30 ticks.backlog/decisions/decision-036and spec the implementation indocs/netcode.md.desync_detected) actually fires on real divergence.Test plan
task game:test— 127/127 test cases passtask check— full gating pipeline green