feat(transactions): add idempotency support and optimistic versioning#569

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jeanc80 wants to merge 7 commits intoyaperos:mainfrom

jeanc80:feat/async-payment-transaction-platform

Commits on Jan 6, 2026

chore: bootstrap java microservices layout and local infra

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docs: add solution overview, architecture and run instructions

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chore: bootstrap ms-payment-transaction-command with Spring Boot 3 and Java 21

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feat(transaction-command): implement transaction API with outbox pattern

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feat(antifraud): add antifraud evaluation service and publish validation events

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jcflores
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feat(transaction): consume validation events and update transaction status

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chore: dockerize microservices and integrate into docker-compose

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