Implement Comprehensive Uniqueness Validation Test Suite

[Plentiful106]

Implement Comprehensive Uniqueness Validation Test Suite

Original Task

Create Integration and End-to-End Tests for Evidence Uniqueness

Summary of Changes

Added integration and end-to-end tests to validate evidence uniqueness and submission validation mechanisms

Acceptance Criteria

Create a test suite that covers all uniqueness validation scenarios
Verify that duplicate submissions are consistently rejected
Test concurrent submission scenarios to ensure thread safety
Measure and document performance impact of uniqueness checks
Achieve 95% test coverage across uniqueness validation components
Performance tests show validation overhead is within acceptable limits

Tests

• Test duplicate submission rejection
• Validate concurrent submission thread safety
• Measure performance overhead of uniqueness checks
• Verify uniqueness validation across different scenarios
• Ensure 95% test coverage for uniqueness validation components