fix(cmd/blob): fix namespace parsing in cli

[vgonkivs]

Closes #4000

[Wondertan]

Fastest fix on the west

[vgonkivs]

🤠

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.

Project coverage is 45.37%. Comparing base (2469e7a) to head (a76bfbd).
Report is 406 commits behind head on main.

Files with missing lines	Patch %	Lines
nodebuilder/blob/cmd/blob.go	0.00%	16 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4003      +/-   ##
==========================================
+ Coverage   44.83%   45.37%   +0.54%     
==========================================
  Files         265      309      +44     
  Lines       14620    22021    +7401     
==========================================
+ Hits         6555     9993    +3438     
- Misses       7313    10954    +3641     
- Partials      752     1074     +322     

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[Wondertan]

This solution works, but imo we shoul just have a smart string -> namespace func somewhere in go sqaure

[renaynay]

agree w hlib re go-square comment

[Wondertan]

@vgonkivs, care for an issue to go-square?