-- 002_add_indexes.sql
-- Additional indexes for query performance.
-- Compatible with both PostgreSQL (local dev) and CockroachDB (production).

-- Speed up OTP/magic-link/reset token lookup in FindValid queries.
-- The existing partial index on (email, purpose, expires_at) doesn't cover the code column,
-- so queries filtering on code must scan all matching rows.
CREATE INDEX IF NOT EXISTS idx_auth_codes_code ON auth_codes (code)
    WHERE used_at IS NULL;