Function ValidateVideoGenerationSpecAsync

ValidateVideoGenerationSpecAsync(
    spec: VideoGenerationSpec,
    stage?: VideoProductionStatus,
    contextUser: UserInfo,
    options?: VideoSpecValidationOptions,
): Promise<VideoSpecValidationResult>
Validates a VideoGenerationSpec against both pure structural/stage rules and server-side database state (MJ: Brand Kits, MJ: Video Archetypes, and MJ: Files readability as contextUser).

Never throws: if an engine Config call or RunView fails, adds an 'AsyncValidationFailed' error and returns { Valid: false, Errors }.
Parameters
- spec: VideoGenerationSpec
  The VideoGenerationSpec document to validate.
- stage: VideoProductionStatus = spec.Status
  Target lifecycle stage to validate against (defaults to spec?.Status).
- contextUser: UserInfo
  Server-side user context used for engine configuration and MJ: Files RLS/permissions.
- Optionaloptions: VideoSpecValidationOptions
  Optional pure-validator constraints (MaxGeneratedVideoSeconds, BrandKitAssetKeys).
Returns Promise<VideoSpecValidationResult>
- Defined in packages/AI/VideoStudio/Engine/src/validate-spec-async.ts:48