[python] Add the spatial-encoding version to Scene and PointCloudDataFrame objects

[jp-dark]

Issue and/or context: sc-61913

Adds the spatial encoding version to Scene and PointCloudDataFrame objects.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.25%. Comparing base (dc118ee) to head (6094ad8).
Report is 19 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3559      +/-   ##
==========================================
+ Coverage   86.20%   86.25%   +0.05%     
==========================================
  Files          55       55              
  Lines        6400     6402       +2     
==========================================
+ Hits         5517     5522       +5     
+ Misses        883      880       -3     

Flag	Coverage Δ
python	86.25% <100.00%> (+0.05%)	⬆️

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

Components	Coverage Δ
python_api	86.25% <100.00%> (+0.05%)	⬆️
libtiledbsoma	∅ <ø> (∅)

[github-actions]

The backport to release-1.15 failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-release-1.15 release-1.15
# Navigate to the new working tree
cd .worktrees/backport-release-1.15
# Create a new branch
git switch --create backport-3559-to-release-1.15
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick --mainline 1 686f4f4ad6578c3ea1a9e39404e935ba4003a51e
# Push it to GitHub
git push --set-upstream origin backport-3559-to-release-1.15
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-release-1.15

Then, create a pull request where the base branch is release-1.15 and the compare/head branch is backport-3559-to-release-1.15.