fix(linux): ensure NvFBC capture works after multiple sessions

[insanemal]

Description

Please excuse the code. Basically I had a suspicion that the 'ctx_t' helper in the NvFBC code path was releasing the context early and that the exhaustion of session handles was causing the "can only reconnect 2-4 times" before it fails to reconnect bug. #2974

So I tried a dirty workaround of binding the context before destroying the session handle. And guess what, it works.

I also added some error logs around when it binds and unbinds the context to confirm my suspicions.

Really the whole code needs to be reworked to ensure the ctx_t class remains in scope correctly. But that's a little above my skill level.

Issues Fixed or Closed

Fixes #2974

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

[CLAassistant]

All committers have signed the CLA.

[ns6089]

It ain't stupid if it works.
Just remove needless log lines and we should be able to merge this.

[insanemal]

Ok Done.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 9.69%. Comparing base (a669b36) to head (8d7742c).
Report is 1 commits behind head on master.

Files	Patch %	Lines
src/platform/linux/cuda.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #3020      +/-   ##
=========================================
- Coverage    9.69%   9.69%   -0.01%     
=========================================
  Files          97      97              
  Lines       17524   17525       +1     
  Branches     8204    8204              
=========================================
  Hits         1699    1699              
- Misses      12987   12988       +1     
  Partials     2838    2838              

Flag	Coverage Δ
Linux	7.20% <0.00%> (-0.01%)	⬇️
Windows	5.11% <ø> (ø)
macOS-12	10.35% <ø> (ø)
macOS-13	10.27% <ø> (+0.01%)	⬆️
macOS-14	10.58% <ø> (ø)

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

Files	Coverage Δ
src/platform/linux/cuda.cpp	1.59% <0.00%> (-0.01%)	⬇️