Improved filtering

[kzscisoft]

Improve and Refactor Filters

Issue: N/A

Python Version(s) Tested: 3.14.3

Operating System(s): Ubuntu 25.10

Documentation PR: N/A

📝 Summary

Restructures the filter object locations, adds further filters and validation

🔄 Changes

• Filters now in simvue.api.objects.filters subdirectory.
• Remove dynamic filter generation in favour of explicit definitions.
• Added pydantic validation to check filters before they are used on the server.

✔️ Checklist

• Unit and integration tests passing.
• Pre-commit hooks passing.
• Quality checks passing.
• Updated the documentation.