Rename cycle parameters from name to params_name

[jessegrabowski]

This is a small change for consistency with recent changes to the other components. It renames the initial state parameters (the cycle component strengths) from f'{name}' to f'params_{name}'. For example, given:

    cycle = st.CycleComponent(
        name="my_cycle_component",
        cycle_length=12,
        estimate_cycle_length=False,
        innovations=False,
        dampen=True,
        observed_state_names=["data_1", "data_2", "data_3"],
    )

Before:

cycle.param_names 
# ['my_cycle_component']

After:

cycle.params_name
# ['params_my_cycle_component']

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Pull Request Overview

This PR renames the initial state parameters for the CycleComponent from {name} to params_{name} for consistency with other components in the codebase. The change affects parameter naming in both the component implementation and all associated tests.

Key changes:

• Updated parameter name generation from f"{self.name}" to f"params_{self.name}"
• Modified all test cases to use the new parameter naming convention
• Maintained backward compatibility for all other parameter names (dampening, sigma, etc.)

Reviewed Changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated no comments.

File	Description
pymc_extras/statespace/models/structural/components/cycle.py	Updated parameter name generation and metadata to use params_ prefix
tests/statespace/models/structural/components/test_cycle.py	Updated all test cases to use new parameter names in dictionaries
tests/statespace/models/structural/test_against_statsmodels.py	Updated statsmodels comparison test to use new parameter naming

[AlexAndorra]

All good, thanks @jessegrabowski