fix: auditor finding 6

[cody-littley]

Why are these changes needed?

Auditor Request

• if len(resp.bundles) > len(resp.metadata), indexing resp.metadata[i] will panic. This could be happened when the malicious relays return more bundles than the validator requested. [Code]
• Recommendation: Later validation stages will catch blob inconsistencies, so before iterating, assert that len(resp.bundles) == len(resp.metadata). If they differ, return an error.

        for i, bundle := range resp.bundles {
            metadata := resp.metadata[i]

Auditor Response

I've fixed the issue by adding a check that fails the operation if there is a size mismatch.