- Created MICROSERVICES_TESTING_GUIDE.md with detailed testing procedures
- Updated GPU service README with detailed testing steps and expected responses
- Updated Marketplace service README with detailed testing steps and expected responses
- Updated Trading service README with detailed testing steps and expected responses
- Updated Governance service README with detailed testing steps and expected responses
- Updated API gateway README with detailed testing steps and routing tests
This completes Phase 7b: Update service READMEs with detailed testing steps
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