Release 2925.6.26

Changes from 2025.5.2 to 2025.6.26

New support for native HDF5 files

• The HDF5 files can be uploaded to the server and 'unfold'ed into
  component datasets, which are then available for browsing and
  downloading.

• The datasets are suffixed with .b2nd to indicate that
  they can be browsed and downloaded as Blosc2-compressed arrays, but
  they are actually proxies to the original HDF5 datasets. This allows
  for a more efficient use of space and faster access to the data.

• New tutorial on how to use the HDF5 support:
  https://ironarray.io/caterva2-doc/tutorials/hdf5.html

Web frontend

• Improvements in the tomography viewer:

  • It now supports travelling in any direction (not just the first dimension).
  • The size by default is now 512x512 pixels, which is more suitable for
    a faster browsing experience.
  • Update image with JavaScript instead of htmx for reducing latencies.

• The Download and Delete buttons now are always visible, not just on the
  Meta (previously Main) tab as before.

API additions

• New Client.concat and Client.stack methods to be able to concatenate or
  stack datasets in the server. This is useful for creating new datasets from
  existing ones without downloading them.

• These have been added to the REST API as well, so they can be used
  from the web client or any other client that supports the REST API.

Bug fixes and improvements

• Add field-indexing to caterva2. Fixes #187.
• Enabled field filtering for Proxy sources.
• Full support for HDF5Proxy instances in expressions (including where()).
• Support for HDF5 proxies in lazy operands.