* refactor: change refreshRate type to float64 for improved precision
* test: update assertions for refreshRate to use assert.InDelta for precision
* refactor: enforce minimum refresh rate and update related tests
* refactor: change refresh rate type to float32 and update related logic
* refactor: update refresh rate validation and logging in GetRefreshRate method
* refactor: update logging keys for refresh rate validation in GetRefreshRate method
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