Make inferences a separate event

[lrafeei]

This PR makes the following changes as requested from MLops team:

• Each inference is now a separate event. Attach an inference_id to each event.
• Allow addition of metadata to events
• Do not automatically convert feature values to string.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	bandit	3		0	5.82s
✅ PYTHON	black	6	0	0	1.19s
✅ PYTHON	flake8	6		0	0.61s
✅ PYTHON	isort	6	0	0	0.25s
✅ PYTHON	pylint	6		0	4.59s

See detailed report in MegaLinter reports
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

MegaLinter is graciously provided by

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (develop-scikitlearn@00dc996). Click here to learn what that means.
The diff coverage is n/a.

@@                  Coverage Diff                   @@
##             develop-scikitlearn     #910   +/-   ##
======================================================
  Coverage                       ?   81.79%           
======================================================
  Files                          ?      187           
  Lines                          ?    19278           
  Branches                       ?     3309           
======================================================
  Hits                           ?    15769           
  Misses                         ?     2593           
  Partials                       ?      916           

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[hmstepanek]

I've suggested a lot of changes here which might be kinda hard to follow this way so we might wanna just pair on this tomorrow if you would find that easier. Overall pretty good. The major issue is the passing of the metadata and mapping here needs to be done via setting an attribute in the wrapper and then referencing that in the instrumentation instead of trying to pass it through the call stack. It looks like you originally start on the right path in your commit history but then deviated from it in a follow up commit but I think it's a relatively quick fix to adjust it. I've left a note in our channel but I'm considering dropping the mapping addition based on what we discussed in our planning meeting earlier today.