How can I create a AppIntent with SwiftData correctly?

I currently create a AppIntent that contains a custom AppEntity, it shows like this

struct GetTimerIntent: AppIntent {
    static let title: LocalizedStringResource = "Get Timer"
    
    @Parameter(title: "Timer")
    var timer: TimerEntity
    
    func perform() async throws -> some IntentResult {
        .result(value: timerText(timer.entity))
    }
    
    static var parameterSummary: some ParameterSummary {
        Summary("Get time of \(\.$timer)")
    }
    
    func timerText(_ timer: ETimer) -> String {
        // Implementation Folded
    }
}

struct TimerEntity: AppEntity {
    var entity: ETimer
    
    static let defaultQuery: TimerQuery = .init()
    
    static var typeDisplayRepresentation: TypeDisplayRepresentation {
        TypeDisplayRepresentation(name: "Timer")
    }
    
    var id: UUID {
        entity.identifier
    }
    
    var displayRepresentation: DisplayRepresentation {
        DisplayRepresentation(title: "\(entity.title)")
    }
}

To get the timers, I create a TimerQuery type to fetch them from SwiftData containers.

struct TimerQuery: EntityQuery, Sendable {
    func entities(for identifiers: [UUID]) async throws -> [TimerEntity] {
        print(identifiers)
        let context = ModelContext(ModelMigration.sharedContainer)
        
        let descriptor = FetchDescriptor<ETimer>(
            predicate: #Predicate {
                identifiers.contains($0.identifier)
            },
            sortBy: [.init(\.index)]
        )
        let timers = try context.fetch(descriptor)
        print(timers.map(\.title))
        
        return timers.map {
            TimerEntity(entity: $0)
        }
    }
}

Everything looks make sense since I code it. When I'm testing, the console jump No ConnectionContext found for 105553169752832 and I can't get my datas.

How can I solve this issue?