Gate biometric /verify on real embedding presence, not the denormalized is_biometric_enrolled flag

[ahmetabdullahgultekin]

Inline code marker.

Location: src/main/java/com/fivucsas/identity/application/service/VerifyBiometricService.java:50

TODO(flag-consistency): the verify gate keys off the denormalized is_biometric_enrolled boolean rather than actual embedding presence.

The marker stays in the code (annotated (#this) in place).

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Migrated from src/main/java/com/fivucsas/identity/application/service/VerifyBiometricService.java:50.