fix(auth): Account signup email used in chage 2fa endpoint
commit 1bd063457c33c9205f18c698f869a70735669844 Author: Valerie PomerleauDate: Wed Oct 8 08:47:13 2025 -0400 fix(auth): Account signup email used in chage 2fa endpoint Because: * Account signup email is used in change 2fa routes instead of primary email This commit: * Pull email from credentials and not original account.email Closes #FXA-12504