DSSKey no longer supported by paramiko 4.0.0

[cels]

Describe the bug

Connecting via SSH no longer works with python-paramiko 4.0.0-1 installed as the devs seemingly removed support for DSSKey resulting in this error message:

ImportError: cannot import name 'DSSKey' from 'paramiko' (/usr/lib/python3.13/site-packages/paramiko/init.py). Did you mean: 'RSAKey'?

Removing DSSKey from src/pyinfra/connectors/ssh_util.py fixes the issues and SSH connection is working again.
See https://www.paramiko.org/changelog.html -> 4.0.0

To Reproduce

Install paramiko 4.0.0 and try to use SSH.

Expected behavior

SSH should work. :-)

Meta

output of pyinfra --support

    System: Linux
      Platform: Linux-6.17.5-arch1-1-x86_64-with-glibc2.42
      Release: 6.17.5-arch1-1
      Machine: x86_64
    pyinfra: v3.5.2
      click: v8.2.1
      distro: v1.9.0
      gevent: v25.9.1
      jinja2: v3.1.6
      packaging: v25.0
      paramiko: v4.0.0
      python-dateutil: v2.9.0
      typeguard: v4.4.4
      typing-extensions: v4.15.0
    Executable: /usr/bin/pyinfra
    Python: 3.13.7 (CPython, GCC 15.2.1 20250813)

Installed via yay from Arch's AUR

pyinfra-debug.log

  File "/usr/lib/python3.13/site-packages/pyinfra_cli/cli.py", line 243, in cli
    _main(*args, **kwargs)
    ~~~~~^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/pyinfra_cli/cli.py", line 353, in _main
    inventory = make_inventory(
        inventory,
    ...<2 lines>...
        group_data_directories=group_data,
    )
  File "/usr/lib/python3.13/site-packages/pyinfra_cli/inventory.py", line 173, in make_inventory
    return make_inventory_from_files(inventory, override_data, cwd, group_data_directories)
  File "/usr/lib/python3.13/site-packages/pyinfra_cli/inventory.py", line 304, in make_inventory_from_files
    fake_inventory = Inventory((all_hosts, all_data), **fake_groups)
  File "/usr/lib/python3.13/site-packages/pyinfra/api/inventory.py", line 58, in __init__
    self.make_hosts_and_groups(names, groups)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/pyinfra/api/inventory.py", line 61, in make_hosts_and_groups
    all_connectors = get_all_connectors()
  File "/usr/lib/python3.13/site-packages/pyinfra/api/connectors.py", line 13, in get_all_connectors
    entrypoint.name: _load_connector(entrypoint)
                     ~~~~~~~~~~~~~~~^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/pyinfra/api/connectors.py", line 8, in _load_connector
    return entrypoint.load()
           ~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3.13/importlib/metadata/__init__.py", line 179, in load
    module = import_module(match.group('module'))
  File "/usr/lib/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/usr/lib/python3.13/site-packages/pyinfra/connectors/dockerssh.py", line 15, in <module>
    from .ssh import SSHConnector
  File "/usr/lib/python3.13/site-packages/pyinfra/connectors/ssh.py", line 21, in <module>
    from .ssh_util import get_private_key, raise_connect_error
  File "/usr/lib/python3.13/site-packages/pyinfra/connectors/ssh_util.py", line 5, in <module>
    from paramiko import (
    ...<7 lines>...
    )
ImportError: cannot import name 'DSSKey' from 'paramiko' (/usr/lib/python3.13/site-packages/paramiko/__init__.py). Did you mean: 'RSAKey'?