sloproxy

refactor(pluginhost): replace `Snapshot().records` with `activeRecords` for improved filtering master

- Introduced `activeRecords` and `activeRecordsFromSnapshot` to filter current plugin records more efficiently. - Updated all instances of `Snapshot().records` across code and tests to use `activeRecords`. - Added additional checks for `recordCurrent` and plugin identity validation in several plugin capability calls. - Enhanced test logic to validate `activeRecords` usage and ensure consistent behavior.