Sunpy-soar

===

- Added support for path string interpolation, which allows you to do (for example)
``Fido.fetch(query, path=tmp_path / '{instrument}')`` and the name of the instrument will be used in the save path.
This works for all supported Fido attrs.

===

- The ``Identifier`` attribute is deprecated - use ``Product`` instead, which is a direct replacement (with a better name!).
- Allow time-only searches to be made.
- Registered the ``Product`` attribute in the ``sunpy.net.attrs.soar`` namespace.
After running ``import sunpy.net.attrs as a``, the attribute can now be accessed using ``a.soar.Product``.
- The ``"Filesize"`` column in returned results now has units of ``astropy.units.Mbyte`` (previously it had no units).
- Removed a validation check on ``a.Level``.
If an level that SOAR doesn't understand is passed, zero results will now be returned instead of an error
being raised.

===

- Fixed download of data where multiple versions of the requested file are available.
Only the most recent version will be downloaded.
- Added some log messages to the sunpy logger at DEBUG level

==================

===

- Fixed searches where there are no results.
- Added filesize to the result table
- Raise an error if the SOAR server can't be reached