fix(client): Interop transition rules

[clabby]

Overview

Small fix to the interop transition step, where:

1. No-op transitions were wrongfully rejected.
2. The validity of the claimed timestamp wasn't checked.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 88.8%. Comparing base (976ad0c) to head (c530ab0).
Report is 4 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
crates/driver/src/core.rs	0.0%	2 Missing ⚠️

Additional details and impacted files

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