feat: Improve error handling when fetching trust anchors

[ale-adobe]

• Includes the error message directly when throwing the Error object in resolveTrustSettings
• Handle failed fetch calls when fetching a resource by wrapping the call in a try-catch block and reporting different error messages based on what actually happened. Network errors can be differentiated from actual errors coming from the fetch (e.g. 429, 404, etc.).

[changeset-bot]

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