fix: explicit auth schema for users table in m3_auth_completeness migration

migrations/20260315000002_m3_auth_completeness.sql

@@ -2,11 +2,11 @@
 -- Add support for deleted_at, email_change tracking, and MFA challenges
 
 -- Add deleted_at column for soft delete support
-ALTER TABLE users ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMPTZ;
+ALTER TABLE auth.users ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMPTZ;
 
 -- Add email change tracking columns
-ALTER TABLE users ADD COLUMN IF NOT EXISTS email_change TIMESTAMPTZ;
-ALTER TABLE users ADD COLUMN IF NOT EXISTS email_change_token_new TEXT;
+ALTER TABLE auth.users ADD COLUMN IF NOT EXISTS email_change TIMESTAMPTZ;
+ALTER TABLE auth.users ADD COLUMN IF NOT EXISTS email_change_token_new TEXT;
 
 -- Create MFA challenges table for tracking MFA verification attempts
 CREATE TABLE IF NOT EXISTS auth.mfa_challenges (