Attempt to pull images from repo.blackduck.com by default before trying Docker HUB.

[andrian-sevastyanov]

Attempt to pull images from repo.blackduck.com by default before trying Docker HUB.

A new property --inspector.repository.preferred.registry now defaults to repo.blackduck.com/containers/.
If set, Docker Inspector will first try to pull the images required for running from this registry.
If this is set to an empty string, Docker Inspector will proceed directly to Docker HUB.

[Copilot]

Pull Request Overview

This PR introduces a preferred registry fallback mechanism for Docker Inspector images. The system will now attempt to pull images from repo.blackduck.com/containers/ by default before falling back to Docker HUB.

• Adds a new configuration property inspector.repository.preferred.registry with default value repo.blackduck.com/containers/
• Implements fallback logic that tries the preferred registry first, then Docker HUB if preferred registry fails
• Adds state tracking to avoid repeated attempts to unreachable preferred repositories

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
Config.java	Adds new configuration property for preferred registry with getter method
ImageInspectorClientStartServices.java	Implements preferred registry fallback logic with new PullResult class
IiClientContainersStartedAsNeededTest.java	Updates test to mock the new configuration property

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