Map Upstream Services: Create and Update Documentation of Rails Code Services

[jennb33]

Issue Description

We need a comprehensive list of the upstream services that Vets API makes call-outs to. Existing documentation and diagrams exist, but they're stale and outdated. The various sources of truth should be reviewed and an updated list needs to be created and documented.

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Tasks

• [ ] Update Rails Code existing documentation in ticket 79579
• [ ] Review and Update any topology graphs in va-gov-sensitive
• [ ] Review and Update Confluence and Platform Website facing docs
• [ ] Update contact info for each service

Success Metrics

• [ ] ADD SUCCESS METRICS HERE

Acceptance Criteria

• [ ] Updated documentation and diagrams for Platform Product upstream services that can be shared to all VA Platform stakeholders.

[LindseySaari]

As part of this ticket, we should also discover which endpoints are being called per downstream service along with what version of the API