Add the ability to sync sessions in an advance interval: 1 or 2 months

Problem/Motivation

We currently get session data roughly 10 to 12 days in advance. Since some YMCAs already have their schedules on Y360 with a longer lead time (e.g., 1-2 months), it would be advantageous to implement functionality that can utilize this advanced information.

Proposed resolution

To add some improvements to the sync logic to be able to get sessions for a wider period in advance.