Add a guided Launch Mode calibration wizard

[PurpleSentinel]

Parent: #23

Summary

Help users choose a reliable sensitivity for their vehicle and mounting position using recorded stationary and sample-launch data.

Acceptance criteria

• Guide the user through stationary baseline and representative movement sampling.
• Show measured noise and peak acceleration in understandable units.
• Recommend but do not silently save a sensitivity.
• Detect poor samples and allow cancellation.
• Validate recommendations using deterministic sample sets and hardware trials.

Roadmap group

Sensors, power, and hardware expansion