feat: Added expand flag to stringify_unsupported() to expand series

[SiddhantSadangi]

Before submitting checklist

stringify_unsupported() does not currently expand lists, casting them to string instead.

For dicts that contain lists as values, as shown below

nested_dict = {
    "name": "John Doe",
    "age": 30,
    "is_employee": True,
    "address": {"street": "123 Main St", "city": "Anytown", "postal_code": "12345"},
    "projects": [
        {"name": "Project Alpha", "status": "completed", "budget": 100000},
        {"name": "Project Beta", "status": "in progress", "budget": 150000},
    ],
    "skills": ["Python", "Data Analysis", "Machine Learning"],
    "employment_history": [
        {"company": "Company A", "position": "Data Scientist", "years": 3},
        {"company": "Company B", "position": "Software Engineer", "years": 2},
    ],
}

this leads to keys like projects, skills, and employment_history being logged as a string

Example

This makes it harder to find relevant information if it is nested as a list in a dict, and also makes it a lot harder to download such metadata from Neptune, as it would be downloaded as a string.

This PR adds an optional expand flag to stringify_unsupported() to expand series like lists, sets, and tuples thereby storing nested values in their proper folder structure within enumerated folders, making it easier to both search for metadata and download it.

Example

• Did you update the CHANGELOG? (not for test updates, internal changes/refactors or CI/CD setup)
• Did you ask the docs owner to review all the user-facing changes?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.59%. Comparing base (7da7535) to head (c0f65f2).
Report is 1 commits behind head on dev/1.x.

Additional details and impacted files

@@             Coverage Diff             @@
##           dev/1.x    #1862      +/-   ##
===========================================
- Coverage    77.56%   75.59%   -1.97%     
===========================================
  Files          303      303              
  Lines        15382    15366      -16     
===========================================
- Hits         11931    11616     -315     
- Misses        3451     3750     +299     

Flag	Coverage Δ
e2e	?
e2e-management	?
e2e-s3	?
e2e-s3-gcs	?
macos	75.27% <100.00%> (-2.02%)	⬇️
py3.10	?
py3.11	?
py3.12	?
py3.8	75.59% <100.00%> (-1.93%)	⬇️
py3.9	?
ubuntu	75.41% <100.00%> (-2.02%)	⬇️
unit	75.59% <100.00%> (-0.04%)	⬇️
windows	74.50% <100.00%> (-1.97%)	⬇️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[kgodlewski]

I think we just need a better explanation, apart from that LGTM

[kgodlewski]

Let's wait for @normandy7's approval then it's good to merge