refactor: incremental payment flow refactoring — tests, exceptions, REST API, and async events#179

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devin/1777458194-refactor-payment-flows

Commits on Apr 29, 2026

chore: add H2 test dependency, fix maven-compiler-plugin for Java 17, add test properties

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feat: add comprehensive test suite for payment flows

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refactor: add custom exceptions, @Transactional, and input validation

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feat: add REST API layer with DTOs, global error handling, and API tests

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refactor: migrate transaction logging to async event-driven pattern

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