Method uploadFile

backend/src/storage/files.service.ts:27–54

(
    auth: AuthContext | null,
    fileName: string,
    buffer: Buffer,
    mimeType: string,
  )

  }

  async uploadFile(
    auth: AuthContext | null,
    fileName: string,
    buffer: Buffer,
    mimeType: string,
  ): Promise<UploadedFile> {
    const organizationId = this.requireOrganizationId(auth);
    // Upload to MinIO
    const { storageKey, size } = await this.storageService.uploadFile(fileName, buffer, mimeType);

    // Save metadata to database
    const file = await this.filesRepository.create({
      fileName,
      mimeType,
      size,
      storageKey,
      organizationId,
    });

    return {
      id: file.id,
      fileName: file.fileName,
      mimeType: file.mimeType,
      size: file.size,
      storageKey: file.storageKey,
      uploadedAt: file.uploadedAt,
    };
  }

  async getFileById(auth: AuthContext | null, id: string): Promise<UploadedFile> {
    const organizationId = this.requireOrganizationId(auth);