Increase Trace sampling to 60 Hz

[kevinatlee]

Summary

• increase active Trace latest-point sampling from approximately 30 Hz to 60 Hz
• retain bounded processing, cached geometry, segment interpolation, and lifecycle cleanup
• update focused runtime coverage and performance documentation

Validation

• focused Trace tests: 23 passed
• full repository tests: 809 passed
• complete local validation and production smoke passed
• exact-head PR CI passed
• exact-head test image published successfully with matching immutable/mutable digest
• physical device testing approved

Ready for squash merge to main.