fix: require registration for each wallet

[xlamn]

• before it was only checked if the account has KycStepName.REALUNIT_REGISTRATION
• now it is checked if the wallet is included in the KycStep

Release Checklist

Pre-Release

• Check migrations
  • No database related infos (sqldb-xxx)
  • Impact on GS (new/removed columns)
• Check for linter errors (in PR)
• Test basic user operations (on DFX services)
  • Login/logout
  • Buy/sell payment request
  • KYC page

Post-Release

• Test basic user operations
• Monitor application insights log

[theresia-web]

✅ Approved

Code review durchgeführt. Die Änderungen sind korrekt implementiert:

• ✅ Wallet-spezifische Registrierungsprüfung statt Account-weit
• ✅ Case-insensitive Wallet-Vergleich
• ✅ Null-Safety implementiert
• ✅ DRY: Methode wird konsistent an allen 3 Stellen verwendet

Keine Security-Issues gefunden.