**Summary**
The `.section` field in `ElementMetadata` is dead code, possibly a
remainder from a prior iteration of `partition_epub()`. In any case, it
is not populated by any partitioner. Remove it and any code that uses
it.
**Summary**
This final PR in the "orig_elements" series adds the needful such that
`.metadata.orig_elements`, when present on a chunk (element), is
serialized to JSON when the chunk is serialized, for instance, to be
used in an HTTP response payload.
It also provides for deserializing such a JSON payload into chunks that
contain the `.orig_elements` metadata.
**Additional Context**
Note that `.metadata.orig_elements` is always `Optional[list[Element]]`
when in memory. However, those original elements are serialized as
Base64-encoded gzipped JSON and are in that form (str) when present as
JSON or as "element-dicts" which is an intermediate
serialization/deserialization format. That is, serialization is `Element
-> dict -> JSON` and deserialization is `JSON -> dict -> Element` and
`.orig_elements` are Base64-encoded in both the `dict` and `JSON` forms.
---------
Co-authored-by: scanny <scanny@users.noreply.github.com>
This PR culminates the restructuring of chunking over my prior
dozen-or-so commits by adding the new options to the API and
documentation.
Separately I'll be adding a new ingest test to defend against
regression, although the integration test included in this PR will do a
pretty good job of that too.
### Summary
We no longer use the "bricks" terminology for partioning functions, etc
in the library. This PR updates various references to bricks within the
repo and the docs. This is just an initial pass to swap the terminology
out, it'll likely be helpful to reorganize the docs a bit as well.
---------
Co-authored-by: qued <64741807+qued@users.noreply.github.com>
Co-authored-by: ryannikolaidis <1208590+ryannikolaidis@users.noreply.github.com>
