fix: Make indexer only process the block if it completes the whole block

[ChaoticTempest]

With this PR, we will only add the sign request of a block if we were able to completely process the block. So if we fail anywhere in the block, we can rollback to the same block without having to worry about revisiting the same sign requests if we added them to our queue already

[github-actions]

Terraform Feature Environment Destroy (dev-689)

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Pusher: @ChaoticTempest, Action: pull_request, Working Directory: ``, Workflow: Terraform Feature Env (Destroy)