ADR-0094: Six authenticator import formats are parsed in one place, vault-core

Status: accepted

Context

Parsed twice is six chances for the app and the CLI to disagree about what a file meant, and the disagreement is a seed that imports with the wrong period and produces codes the issuer rejects. The app calls it over IPC, as pools.ts already does — no twin, no parity fixture

Decision

Six authenticator import formats are parsed in one place, vault-core

Evidence

vault-core/src/totp_import.rs