fix: xray v25.8.3+ compatibility

[BiMaghz]

In recent versions of xray-core , the output of x25519 -i command has changed.

• Old Output: Public key: ...
• New Output: Password: ...

Issue: the regex in _utils.py failed to match the new output format, causing get_x25519 to return None. This led to a crash during startup when _config.py attempted to access the key.

• Error Log:

marznode-1  | 2025-11-22 14:33:41,210 - INFO - marznode.marznode: Generating a keypair for Marznode.
marznode-1  | Traceback (most recent call last):
...
marznode-1  |   File "/app/marznode/backends/xray/xray_backend.py", line 94, in start
marznode-1  |     self._config = XrayConfig(backend_config, api_port=xray_api_port)
marznode-1  |   File "/app/marznode/backends/xray/_config.py", line 55, in __init__
marznode-1  |     self._resolve_inbounds()
marznode-1  |   File "/app/marznode/backends/xray/_config.py", line 142, in _resolve_inbounds
marznode-1  |     settings["pbk"] = x25519["public_key"]
marznode-1  | TypeError: 'NoneType' object is not subscriptable```

fix: updated marznode/backends/xray/_utils.py: Added regex support for new Password: label while maintaining backward compatibility for older xray versions.

[sonarqubecloud]

Quality Gate failed

Failed conditions
2 Security Hotspots

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