Secondary read failures when doing lookups against eigenda-proxy

[ethenotethan]

Some EigenDA certificate fields are ignored when posting to the sequencer inbox. This results in having to embed custom translation to go from the ABI encoded cert type known to the inbox to the certificate type known to eigenda-proxy (cert' --> cert).
Currently, there's a bug where this translation fails to include the fee field - resulting in a cert with one missing field or cert''. This affects secondary storage lookups since they entry key is computed as H(cert).

So in essence:

Proxy --cert--> batch poster --cert' --> inbox

And the nodes deriving:

inbox --cert`--> preprocess --> cert'' --> proxy

Where derivation should be:

inbox --cert`--> preprocess --> cert --> proxy

The fix is pretty trivial, but we should establish some tests to ensure this never happens again.