feat: Enhance SubscribeFilter to Support Multiple Instances

[mSabzali]

Feature: Enhance SubscribeFilter to Support Multiple Instances

Summary

This PR enhances the filtering mechanism by allowing the use of multiple filters instead of just one. It provides more flexibility and enables advanced scenarios where multiple filters need to be applied in sequence or conditionally.

What Has Changed

• Modified the configuration model to support multiple filters.
• Preserved backward compatibility: single-filter configurations still work.

Why It's Useful

This feature enables scenarios where users need to:

• Apply layered processing logic
• Compose filters in different modules
• Have more granular control over message handling

Testing

• All existing tests pass

Notes

• This is my first contribution to CAP.
• Let me know if you'd like any changes, improvements, or if you'd prefer an issue to be created for tracking.

Additional Request

Hello, thank you for your efforts on the CAP project. This PR is ready for review to support multiple filter instances, and the tests have passed successfully. Is there any change or additional information needed? @yang-xiaodong