Client - Recurring Task Schedules

One client's schedule links on recurring tasks. Every recurring task has a default schedule plus any number of custom schedules; a client linked to a custom schedule gets its occurrences from that schedule instead of the default. These routes read the schedule a client is linked to on a task, link the client to an existing schedule, and revert the client to the default. On the client-filtered recurring-tasks list, each row's schedule is the one that applies to the client. The schedules themselves are managed task-side - see the schedule routes under the Tasks - Recurring tag.