Run published WaveBot impedance gate in Python CI

[cmccomb]

What changed

• Bundle the exact pinned 600 s WaveBot CalcImpedance hydrodynamics, published multisine input, and compact unrounded MATLAB trajectory and force fixture with provenance hashes.
• Run the existing independent full-duration motion, actuation, mooring, linear-damping, and drag gates in ordinary Python CI. The live-source workflow uses the same tests and limits.
• Keep the physical diagonal damping default independently checked; the published MATLAB input's indexed damping remains opt-in.

This case was already counted in the WaveBot parity badge. Coverage remains displayed at 79% from measured combined line and branch coverage.

Verification

• Portable and live-source focused tests: 2 passed in 30.93 s and 2 passed in 31.16 s.
• Full local suite: 270 passed, 331 skipped in 373.43 s; combined coverage 78.7424%.
• Coverage badge, parity badge, and diff checks passed.