## Description\nWrite API integration tests verifying validation rules.\n\n## Files to Edit/Create\n- `backend/tests/yield_api_tests.rs`\n\n## Acceptance Criteria\n- Cover validation cases and input format checks.\n\n## Guidance / Hints\nVerify API inputs validate constraints successfully.
Description\nWrite API integration tests verifying validation rules.\n\n## Files to Edit/Create\n-
backend/tests/yield_api_tests.rs\n\n## Acceptance Criteria\n- Cover validation cases and input format checks.\n\n## Guidance / Hints\nVerify API inputs validate constraints successfully.