Fix regression: Monitoring of payment stream

[olethanh]

Problem: in monitoring_payment_task
the check of stream payment was not done

Regression introduced in #726

Related ClickUp, GitHub or Jira tickets : none

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.
• Documentation has been updated regarding these changes.
• Dependencies update in the project.toml have been mirrored in the Debian package build script packaging/Makefile

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.

Project coverage is 62.90%. Comparing base (b020227) to head (788d0cf).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/aleph/vm/orchestrator/tasks.py	0.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #749      +/-   ##
==========================================
- Coverage   62.91%   62.90%   -0.01%     
==========================================
  Files          74       74              
  Lines        6541     6540       -1     
  Branches      541      541              
==========================================
- Hits         4115     4114       -1     
  Misses       2262     2262              
  Partials      164      164              

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