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- All 16 columns per spec (user, attempted_login, result, failure_reason, event_time, ip/geo fields, user_agent triple, device_type, database). - Check constraint binds failure_reason presence to result value. - Three composite indexes (user+time, login+time, geo_state+time) supporting the per-user, failure-burst, and geo cron queries. - Minimal admin-read ACL added so subsequent tests can verify writes. - 3 TransactionCase tests passing: model create, failure_reason nullable on success, geo_lookup_state='internal' accepted. Odoo 19 deprecation note: this implementation uses the declarative models.Constraint and models.Index attributes (Odoo 19 silently drops the legacy `_sql_constraints = [...]` list and `init()`/raw-SQL pattern with only a warning). Captured in CLAUDE.md rule #9. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>