update changelog for v0.8.0 and v0.9.0 (to be released tomorrow 18 Oct 2025, last before big v1.0)

[valeriupredoi]

Description

As we go, gentlemen 🍻

Before you get started

Checklist

• This pull request has a descriptive title and labels
• This pull request has a minimal description (most was discussed in the issue, but a two-liner description is still desirable)
• If you are working on the documentation, please ensure the current build passes
• All tests pass

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.05%. Comparing base (cce3d0b) to head (6f76442).
⚠️ Report is 160 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #127   +/-   ##
=======================================
  Coverage   74.05%   74.05%           
=======================================
  Files          11       11           
  Lines        2598     2598           
  Branches      406      406           
=======================================
  Hits         1924     1924           
  Misses        565      565           
  Partials      109      109           

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