Add motor movement callback to SimMonitor

[cappel89]

LIttle PR to fix a thread leak for the move method of SimPositioner, and have SimMonitor to register a callback on any change of readback from the ref_motor.

[Copilot]

Pull request overview

This PR adds a motor-motion-driven update path for SimMonitor so its computed readback can refresh automatically when the configured reference motor moves.

Changes:

• Add a motor subscription mechanism in SimMonitor (setup_readback_monitor / _update_readback) to trigger monitor readback updates on motor motion.
• Extend SimulatedDataMonitor to register the motor callback when models/params are selected/updated.
• Update the monitor readback test to construct a SimPositioner and assert that monitor subscriptions fire after motor motion.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
ophyd_devices/sim/sim_monitor.py	Introduces motor subscription plumbing to trigger monitor updates on motor motion.
ophyd_devices/sim/sim_data.py	Hooks motor callback registration into monitor sim model selection/parameter updates; refactors param-setting helper.
tests/test_simulation.py	Adjusts monitor readback test to use a simulated motor and adds a callback-on-motion assertion.

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[codecov]

Codecov Report

❌ Patch coverage is 84.28571% with 11 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
ophyd_devices/sim/sim_positioner.py	73.33%	4 Missing ⚠️
ophyd_devices/sim/sim_data.py	89.28%	3 Missing ⚠️
ophyd_devices/sim/sim_monitor.py	85.71%	3 Missing ⚠️
ophyd_devices/utils/static_device_test.py	0.00%	1 Missing ⚠️

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