Sofar backend should directly support integration tests with mock test resources

[evanShap]

Currently, developers must manually modify test code to reference a particular Spotter and expectations. Sofar should expose mock resources via testing API token(s) with known responses. The benefits would be:

• Can run tests without modifying test code and referencing bespoke resources =>
  • Can repeat test results between devs
  • Enables automated CI/CD
• Can increase specificity of integration test expectations. Currently the expectations are fairly generic, asserting a field exists, or a response does not err. With fixed and known data responses, we could enforce schema expectations, performance guardrails, regression protection against backend changes, etc.