This is because the network subgraph (like all subgraphs, unfortunately)
assumes that all addresses are lowercase and not checksummed. A stupid
oversight from the early days.

The previous address was not present in the test allocations.

We may need to add these back later for other purposes, but
indexer-service does not need these fields; the only reason
it queries allocations is to create attestation signers for
them.

There might be even more fields that we could remove. However,
signalled_tokens in particular is necessary at the moment because
there is buggy data in the real-world network subgraph where the
field is negative sometimes. That breaks U256 parsing. Since
we don't need this and the other fields, I thought it best to
remove them.