flowchart TD
    subgraph SimSaaS_Application_Server_Node_js_Process ["애플리케이션 서버"]
        direction TB
        Fastify["Fastify 웹 서버"]

        subgraph API_and_Core_Logic_In_Fastify ["API 및 핵심 로직"]
            direction LR
            TRPC["tRPC API 엔드포인트"]
            Prisma["Prisma ORM"]

            subgraph BullMQ_Integration_App_Code ["작업 큐 라이브러리"]
                direction TB
                QueueObj["BullMQ: simSaaSJobQueue"]
                WorkerObj["BullMQ: simSaaSWorker"]
            end
        end

        Fastify -- "호스팅 및 실행" --> TRPC
        Fastify -- "호스팅 및 실행" --> WorkerObj

        TRPC -- "API 요청 처리" --> Prisma
        TRPC -- "작업 등록 요청" --> QueueObj

        WorkerObj -- "DB 작업" --> Prisma
    end

    subgraph External_Services ["외부 서비스"]
        direction TB
        PostgreSQL["PostgreSQL 데이터베이스"]
        Redis["Redis (작업 큐 저장소 및 브로커)"]
    end

    Prisma -- "데이터 접근" --> PostgreSQL

    QueueObj -- "작업 정보를 Redis에 전송" --> Redis
    WorkerObj -- "처리할 작업을 Redis에서 가져옴" --> Redis


    subgraph CLI_Tool_Client_Side ["Client-Side Tool"]
        CLI["Commander.js CLI"]
        TRPCClient["tRPC Client"]
        CLI --> TRPCClient
        TRPCClient -- "API 호출" --> TRPC
    end

  erDiagram
    Project {
        int id PK "auto-increment"
        string name
    }

    Geometry {
        int id PK "auto-increment"
        int projectId FK
        string fileUrl
    }

    Mesh {
        int id PK "auto-increment"
        int geometryId FK
        int resolution
    }

    Job {
        bigint id PK "auto-increment"
        int meshId FK
        JobStatus status "default PENDING"
        datetime startedAt "nullable"
        datetime finishedAt "nullable"
    }

    Result {
        int id PK "auto-increment"
        bigint jobId FK "UK (Unique)"
        string fileUrl
        json metrics
    }

    %% --- Relationships ---
    Project ||--o{ Geometry : "contains"
    Geometry ||--o{ Mesh : "generates"
    Mesh ||--o{ Job : "uses"
    Job ||--o| Result : "produces"
    %% Job can have 0 or 1 Result; Result must have 1 Job

    %% --- Enum Definitions (as comments, as Mermaid ERD doesn't directly render Enums within diagram) ---
    %% enum JobStatus {
    %%  PENDING
    %%  RUNNING
    %%  FAILED
    %%  SUCCESS
    %% }