fix: Include the pusher flow in maintenance window

[diegovb-sys]

Closes #5359

📑 Description

It's a simple copy paste of the original flow.

✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed

[vercel]

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.37%. Comparing base (57ca737) to head (964b3ee).
⚠️ Report is 34 commits behind head on main.

Files with missing lines	Patch %	Lines
keep/api/bl/maintenance_windows_bl.py	0.00%	19 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5360      +/-   ##
==========================================
- Coverage   46.64%   46.37%   -0.28%     
==========================================
  Files         175      176       +1     
  Lines       18263    18423     +160     
==========================================
+ Hits         8519     8543      +24     
- Misses       9744     9880     +136     

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