fix(snapshot): replay redo checkpoints in order

[OnlyYu1996]

Summary

• store checkpoints skipped by revert_to() in reverse order so LIFO redo() replays the next chronological checkpoint first
• add an end-to-end regression test covering v1 -> revert_to(v1) -> redo() -> v2 -> v3 -> v4

Fixes PlatformNetwork/bounty-challenge#53149.

Validation

• cargo +1.90.0 fmt --package cortex-snapshot --check
• cargo +1.90.0 test -p cortex-snapshot test_redo_after_revert_to_replays_checkpoints_in_order
• cargo +1.90.0 test -p cortex-snapshot
• git diff --check

[greptile-apps]

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