chore: image builder

[bojiang]

No description provided.

[Copilot]

Pull request overview

Adds a Helm-configurable toggle to enable “model eager download” behavior during S3-backed image builds, wiring the setting from chart values into the controller’s bento-image-builder invocation.

Changes:

• Introduces global.modelEagerDownload in the yatai-image-builder Helm values.
• Exposes the value as CONTAINER_IMAGE_MODEL_EAGER_DOWNLOAD via the chart’s env Secret.
• Adds a Go env getter and conditionally appends --model-eager-download to the S3 image builder command flags.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
helm/yatai-image-builder/values.yaml	Adds a configurable chart value to control model eager download behavior.
helm/yatai-image-builder/templates/secret-env.yaml	Plumbs the new value into an env var consumed by the controller.
controllers/resources/bentorequest_controller.go	Reads the env var and conditionally adds the corresponding CLI flag for S3 image builds.

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