Add functionality to pause/resume schedules

[deepakpathania-zz]

Since schedules are picked up based on nextRunningTime, a schedule can be considered paused for a cycle by simply updating their nextRunningTime to their next cycle's time.

For example, if a schedule was supposed to run every hour and the next invocation time is 1PM, if we update it to 2PM, it will not be picked up in the 1PM cycle and can be considered pasued for that duration.

Expose an endpoint that pauses the schedule based on this method for a given number of cycles.

Structure

• POST /v1/schedules/{{identifier}}/pause

{
  "cycles": <int>
}

Similarly, expose an endpoint to resume a paused schedule. Resuming in this context would mean, simply calculating the nextRunningTime based on their original period and setting that as the new nextRunningTime for the schedule.

Structure

• POST /v1/schedules/{{identifier}}/resume