sequenceDiagram
    autonumber
    participant C as Client
    participant R as Commissions Route
    participant Z as Zod Schema
    participant E as ProgramEnrollment (Prisma)
    participant P as Prisma (Commissions)
    participant DB as Database

    C->>R: GET /api/commissions?...&tenantId=...&partnerId=...
    R->>Z: parse(getCommissionsQuerySchema)
    Z-->>R: { programId, tenantId?, partnerId?, ... }

    alt partnerId provided
        Note over R: Use provided partnerId (highest precedence)
        R->>P: findMany(where: { partnerId, programId, ... })
    else tenantId provided and no partnerId
        Note over R: Resolve partnerId via programEnrollment
        R->>E: findFirst(where: { tenantId, programId })
        alt enrollment found
            E-->>R: { partnerId }
            R->>P: findMany(where: { partnerId, programId, ... })
        else none found
            E-->>R: null
            R-->>C: 404 DubApiError.not_found
        end
    else neither provided
        R->>P: findMany(where: { programId, ... })
    end

    P->>DB: Execute query
    DB-->>P: Results
    P-->>R: Commissions[]
    R-->>C: 200 OK JSON