fix(nexus): fix race condition for defer and update control

[kptkin]

Description

What does the PR do?

This PR fixes a race condition in the defer state machine and fixes the control values for the records in the stream.

Testing

How was this PR tested?

Checklist

• Include reference to internal ticket "Fixes WB-NNNNN" and/or GitHub issue "Fixes #NNNN" (if applicable)
• Ensure PR title compliance with the conventional commits standards

🤖 Generated by Copilot at 2a54285

The nexus package had a flaw
It used cgo to call nvml raw
But they refactored the code
And removed that heavy load
Now the system monitor is more au

[codecov]

Codecov Report

Merging #6125 (6d674f3) into main (ad888f5) will decrease coverage by 0.16%.
The diff coverage is 0.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6125      +/-   ##
==========================================
- Coverage   78.12%   77.96%   -0.16%     
==========================================
  Files         380      380              
  Lines       44267    44301      +34     
==========================================
- Hits        34582    34540      -42     
- Misses       9635     9711      +76     
  Partials       50       50              

Flag	Coverage Δ
unittest	81.51% <ø> (-0.11%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
nexus/pkg/server/handler.go	0.00% <0.00%> (ø)
nexus/pkg/server/writer.go	0.00% <0.00%> (ø)

... and 15 files with indirect coverage changes