IIIF: Specifying an incomplete `uuid` in the `image_base` endpoint gives a 500 response

[max-moser]

Package version (if known): 19.5.4

Describe the bug

Providing fewer than expected colons for the ID in the IIIF image_base endpoint gives a 500 error.

Steps to Reproduce

1. Create a record with an image for IIIF
2. Visit the IIIF image_base endpoint, but with less than two colons in the uuid part of the URL path
3. See error

Exception on /iiif/record:9tp42-0pk88 [GET]
Traceback (most recent call last):
  File "/var/instance/.venv/lib/python3.13/site-packages/flask/app.py", line 1511, in wsgi_app
    response = self.full_dispatch_request()
  File "/var/instance/.venv/lib/python3.13/site-packages/flask/app.py", line 919, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/var/instance/.venv/lib/python3.13/site-packages/flask/app.py", line 917, in full_dispatch_request
    rv = self.dispatch_request()
  File "/var/instance/.venv/lib/python3.13/site-packages/flask/app.py", line 902, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)  # type: ignore[no-any-return]
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "/var/instance/.venv/lib/python3.13/site-packages/flask_resources/resources.py", line 65, in view
    return view_meth()
  File "/var/instance/.venv/lib/python3.13/site-packages/flask_resources/content_negotiation.py", line 116, in inner_content_negotiation
    return f(*args, **kwargs)
  File "/var/instance/.venv/lib/python3.13/site-packages/flask_cors/decorator.py", line 121, in wrapped_function
    resp = make_response(f(*args, **kwargs))
                         ~^^^^^^^^^^^^^^^^^
  File "/var/instance/.venv/lib/python3.13/site-packages/flask_resources/content_negotiation.py", line 116, in inner_content_negotiation
    return f(*args, **kwargs)
  File "/var/instance/.venv/lib/python3.13/site-packages/flask_resources/parsers/decorators.py", line 51, in inner
    return f(self, *args, **kwargs)
  File "/var/instance/.venv/lib/python3.13/site-packages/flask_resources/responses.py", line 39, in inner
    res = f(*args, **kwargs)
  File "/var/instance/.venv/lib/python3.13/site-packages/invenio_rdm_records/resources/iiif.py", line 152, in _wrapper
    return f(self, *args, **kwargs)
  File "/var/instance/.venv/lib/python3.13/site-packages/invenio_rdm_records/resources/iiif.py", line 216, in base
    item = self.service.get_file(
        identity=g.identity,
        uuid=resource_requestctx.view_args["uuid"],
    )
  File "/var/instance/.venv/lib/python3.13/site-packages/invenio_rdm_records/services/iiif/service.py", line 130, in get_file
    type_, id_, key = self._iiif_image_uuid(uuid)
                      ~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/var/instance/.venv/lib/python3.13/site-packages/invenio_rdm_records/services/iiif/service.py", line 63, in _iiif_image_uuid
    type_, id_, key = uuid.split(":", 2)
    ^^^^^^^^^^^^^^^
ValueError: not enough values to unpack (expected 3, got 2)

Expected behavior

We receive a 400 response that states that our supplied ID is invalid.

Perhaps we should add this to the request view arg parsing?