refactor(schemes): type execute_function with ExecuteFunction protocol

[dlyongemallo]

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[Copilot]

Pull request overview

This PR refactors scheme decode() APIs to use a shared ExecuteFunction protocol for the execute_function callback, and updates the default execution utilities to accept extra keyword arguments for decoder compatibility.

Changes:

• Introduces utils.ExecuteFunction (Protocol) to standardize typing for execution backends passed into scheme decoders.
• Updates scheme decoders (qsm, qpam, sqpam, mqsm, msqpam) to type execute_function as utils.ExecuteFunction (and cleans up unused typing imports).
• Updates utils.execute and utils.execute_with_sampler to accept **kwargs (ignored) to remain compatible with forwarded decoder kwargs.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
quantumaudio/utils/execute.py	Adds ExecuteFunction protocol; makes execution helpers accept **kwargs for decoder forwarding compatibility.
quantumaudio/schemes/sqpam.py	Types execute_function as utils.ExecuteFunction; removes unused typing imports.
quantumaudio/schemes/qsm.py	Types execute_function as utils.ExecuteFunction; removes unused typing imports.
quantumaudio/schemes/qpam.py	Types execute_function as utils.ExecuteFunction; removes unused typing imports.
quantumaudio/schemes/msqpam.py	Types execute_function as utils.ExecuteFunction; corrects keep_padding tuple element types to bool.
quantumaudio/schemes/mqsm.py	Types execute_function as utils.ExecuteFunction; corrects keep_padding tuple element types to bool.

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