Ensure no validation when active_validation is False

[markheik]

Description:

This PR addresses performance issues in #269

JSON schema validation decreases the performance of the function and should be bypassed if
the user does not want the validation and requires performance.

Changed to fastjsonschema which is much faster.

---

I ran the example in the issue #269 locally and results are for active_validation=True:

Before:

• with JSON Schema validation: ~10 ms
• without validation: 0.01 - 0.04 ms

After:

• with JSON Schema validation: ~0.01 - 0.04 ms
• without validation: 0.01 - 0.04 ms

Fixes issue: #269

Checklist:

• Add tests for the change to show correct behavior.
• Add or update relevant docs, code and examples.
• Update CHANGELOG.rst with relevant information and add the issue number.
• Add .. versionchanged:: where necessary.

[markheik]

I am still unsure if we want to acknowledge active_validation value here, but the default should be True.

jsonschema.validate() seems to be slow overall, I will look for a replacement implementation.

There is fastjsonschema which seems to faster.

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (7e7bccb) 99.60% compared to head (0b81ca3) 99.41%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #270      +/-   ##
==========================================
- Coverage   99.60%   99.41%   -0.19%     
==========================================
  Files          40       40              
  Lines        2552     2580      +28     
==========================================
+ Hits         2542     2565      +23     
- Misses         10       15       +5     

Files	Coverage Δ
.../zhinst/toolkit/driver/nodes/command_table_node.py	100.00% <100.00%> (ø)
src/zhinst/toolkit/command_table.py	97.58% <87.17%> (-2.42%)	⬇️

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[markheik]

I will close this in favor of #271 As this is out of scope for #269 .
Will revisit the overall performance improvements later.