* Support filtering audit log entries on user, type, and before id
Adds support for filtering audit log entires with GetAuditLogsAsync. Adds the ability to specify a userId and ActionType to filter. Exposes the beforeId filter which was already implemented, yet unused (even when requesting > 100 entries)?
Was thinking that this could expose overloads of GetAuditLogAsync that accepts a IUser and IAuditLogEntry, but dealing with all the combinations of these types may be excessive.
* use only stringbuilder for args instead of string interpolation
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