Resolve clippy errors after Rust update

[sophie-cluml]

Close: #914

[codecov]

Codecov Report

Attention: Patch coverage is 73.63636% with 58 lines in your changes missing coverage. Please review.

Project coverage is 76.97%. Comparing base (2d2c6b8) to head (90fa862).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/graphql/sysmon.rs	0.00%	28 Missing ⚠️
src/graphql/network.rs	88.35%	17 Missing ⚠️
src/graphql/export.rs	0.00%	5 Missing ⚠️
src/graphql/netflow.rs	0.00%	5 Missing ⚠️
src/graphql.rs	91.30%	2 Missing ⚠️
src/publish.rs	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #915      +/-   ##
==========================================
- Coverage   77.01%   76.97%   -0.05%     
==========================================
  Files          31       31              
  Lines       25569    25806     +237     
==========================================
+ Hits        19692    19864     +172     
- Misses       5877     5942      +65     

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