sagitchu a628f31859 fix(backend): improve captcha validation and forward service sync ...

- Add cloudflare site/secret key validation for captcha enabled check
- Fix forward create to use UpdateService with tolerateExists for idempotent sync
- Introduce isAlreadyExistsMessage helper excluding address-in-use errors
- Add contract tests for forward toggle, address-in-use rollback, captcha compatibility

2026-02-27 14:49:59 +08:00

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contract

fix(backend): improve captcha validation and forward service sync

2026-02-27 14:49:59 +08:00