Fix bugs on aleph node cmds + sanitize_url + missing tests

[philogicae]

Self proofreading checklist

• The new code clear, easy to read and well commented.
• New code does not duplicate the functions of builtin or popular libraries.
• An LLM was used to review the new code and look for simplifications.
• New classes and functions contain docstrings explaining what they provide.
• All new code is covered by relevant tests.

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 2 lines in your changes missing coverage. Please review.

Project coverage is 57.02%. Comparing base (cdf4aab) to head (2105fb9).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/aleph_client/commands/node.py	83.33%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #329      +/-   ##
==========================================
+ Coverage   54.46%   57.02%   +2.55%     
==========================================
  Files          18       18              
  Lines        2585     2592       +7     
  Branches      326      330       +4     
==========================================
+ Hits         1408     1478      +70     
+ Misses       1009      939      -70     
- Partials      168      175       +7     

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[github-actions]

Failed to retrieve llama text: POST 500: 500: Unhandled error during initialisation