### Description
* The `consistent-deps.sh` was fixed to take into account the ingest
dependencies, causing some errors to show up. New constriants were added
to make that script pass.
* Update all requirements without constraint on pydantic, allowing the
latest version to be pulled in.
* `pikepdf` is causing a conflict but there's a fix on their `main`
branch, just need for the next release to be published. Opened up a
question here to see if we can get that out any sooner: [Do releases
happen on a
schedule?](https://github.com/pikepdf/pikepdf/discussions/574). For now
added `lxml<5` to the constraints.
A couple optimizations:
* `constraints.in` renamed to `constraints.txt` since the whole point is
all dependencies are already pinned and the file never gets compiled
* `constraints.txt` moved to a `requirements/deps` directory as this
never gets compiled by `pip-compile`
* Other dependency files updated to reference the new location of
`base.in` and `constraints.txt`
* make file updated since it was originally written to avoid the
`base.in` and `constraints.in` file
### Description
Currently the CI caches the CI dependencies but uses the hash of all
files in `requirements/`. This isn't completely accurate since the
ingest dependencies are installed in a later step and don't affect the
cached environment. As part of this PR:
* ingest dependencies were isolated into their own folder in
`requirements/ingest/`
* A new cache setup was introduced in the CI to restore the base cache
-> install ingest dependencies -> cache it with a new id
* new make target created to install all ingest dependencies via `pip
install -r ...`
* updates to Dockerfile to use `find ...` to install all dependencies,
avoiding the need to update this when new deps are added.
* update to pip-compile script to run over all `*.in` files in
`requirements/`
