fix: pueued crash with malformed secret payload

[Nukesor]

Related to #619

[codecov]

Codecov Report

Attention: Patch coverage is 81.25000% with 18 lines in your changes missing coverage. Please review.

Project coverage is 80.29%. Comparing base (b74a573) to head (221088e).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
pueue_lib/src/network/protocol.rs	80.85%	18 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #621   +/-   ##
=======================================
  Coverage   80.28%   80.29%           
=======================================
  Files          89       89           
  Lines        6401     6495   +94     
=======================================
+ Hits         5139     5215   +76     
- Misses       1262     1280   +18     

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