Validate pandas version 3.0.0

Pandas v3.0.0 was recently released and may introduce breaking changes for any Scouter logic that supports Pandas DataFrames.

## Tasks

- [ ] Update pandas dependency to v3.0.0
- [ ] Run and update existing pytest tests to ensure compatibility
- [ ] Audit all Scouter code paths that accept/process Pandas DataFrames for breaking changes
- [ ] Add conditional version logic where necessary (e.g. behavior differences between pandas 2.x and 3.x)

## Notes

- Affected areas likely include `DataProfiler`, `Drifter`, and any queue/client code that accepts DataFrames as input
- Check for changes to DataFrame internals, copy-on-write semantics, dtype handling, and deprecated APIs that were removed in v3