Add integration tests for analytics endpoints

[robertocarlous]

Summary

Cover the missing integration tests for /api/analytics endpoints: /apy-history, /user-yield, and /protocol-performance.

What to do

• Create tests/integration/api/analytics.test.ts (or separate files) to test:
  • Auth behavior for protected endpoints (401 without token).
  • Successful responses with seeded DB data for a user.
  • Validation error responses for invalid period query values.
  • protocol-performance public endpoint returns grouped protocols structure.
• Use test factories to seed yieldSnapshot, position, and protocolRate data.
• Clean up DB after tests.

Acceptance criteria

• Tests added and passing in CI.
• Coverage includes success and failure cases for each endpoint.

Labels: tests, integration

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