Scheduler Service - Implemented updated REST API and Types

[thoughtpalette]

This PR adds the following functionality:

• Updates Schedule Service to use newly define REST API endpoints.
• Updates Type Definitions utilized in the schedule service.
• Updates tests with the updated Record mocks and endpoints.

@hecsalazarf Please take extra care when reviewing the Type schemas. I attempted to extract them from the OpenAPI docs as best I could and it's important for implementation that these match as best as possible.

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[thoughtpalette]

@hecsalazarf Thanks for your comments! I've made the requested changes. Please feel free to take another look when you have the opportunity.