feat(agent): 云端 Agent - 增加上下文预算、任务事实与终态恢复保障

backend/internal/database/schema.go

@@ -17,7 +17,10 @@ import (
 func Models() []any {
 	return []any{
 		&model.CloudAgentExecution{},
+		&model.CloudAgentEventRecord{},
+		&model.CloudAgentMessageRecord{},
 		&model.CloudAgentCanvasMutation{},
+		&model.CloudAgentResourceLease{},
 		&model.AgentProfile{},
 		&model.AgentLesson{},
 		&model.AgentMemorySetting{},