pattern matching for bytea type similar to '_like'

For my usecase it would be very useful to have pattern matching for `bytea` type inside a query, similar to how `_like` works for
strings.

Currently I have to query all results and filter client-side, which works but does increase bandwith significantly for no benefit.

Thanks in advance 😄

Start by tracing how the existing `_like` query behavior handles strings and how `bytea` values are represented in queries. Define the matching semantics and expected query behavior for bytea, then add coverage showing that pattern matching works without client-side filtering.

Written by the indexing model from the issue text.