Timeout rules
| Column | Type | References | Comments |
| id | Integer | Primary key | |
| vdb_id | Integer | ||
| sla_id | Integer | db_sla.id | SLA ID |
| state_id | Integer | db_state.id | State ID for timeout |
| ttl_minutes | Integer | Timeout in minutes | |
| priority | Integer | Priority: 1 = highest, 5 = lowest | |
| transition_id | Integer | db_state_transition.id | State transition to follow on timeout |
| user_specific_ttl | Boolean (t or f) | If timeout is to be entered by user doing the state transition | |
| mark_delayed | Boolean (t or f) | Whether to mark the process as delayed when timeout happens |