fix: retry fetching the host block header - #228
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Fraser999
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LGTM, let's deploy this to testnet and see if this resolves the timing issue.
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This adds retries when fetching the host block in the
EnvTask.Without this, a single failure will cause a builder to skip building for a given block. If the host RPC is a little behind the rollup, we have a race condition causing skipped blocks.
I also changed the RPC to fetch just the header rather than the full block.