fix(auth): harden pending email verification - #274
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…email-flow-backend # Conflicts: # modules/backend-application/src/test/java/com/idea2strategy/backend/application/identity/EmailRegistrationServiceTest.java # modules/backend-persistence/src/test/java/com/idea2strategy/backend/persistence/identity/IdentityPersistenceIntegrationTest.java
…email-flow-backend
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What changed
Why
Repeated signup requests previously replaced the pending password and verification token and sent another email. That allowed mail flooding and could let an attacker change the password associated with a victim's pending signup.
Impact
Pending users keep the original signup credentials and token. Explicit resend requests are rate-limited with HTTP 429. Expired pending personal data is removed and the email can be registered again.
Validation
./gradlew --no-daemon :modules:backend-application:test :apps:backend-api:test :apps:backend-batch:test :modules:backend-persistence:test --tests com.idea2strategy.backend.persistence.identity.IdentityPersistenceIntegrationTestgit diff --check