chore: bump version to 0.5.600

[AndreRatzenberger]

Summary

Bumps the package version from 0.5.502 to 0.5.600 so the Dapr blackboard integration lands under a more appropriate integration-level version number.

0.5.502 was already published, so this supersedes it rather than trying to rewrite immutable PyPI history.

Changes

• pyproject.toml: 0.5.502 -> 0.5.600
• uv.lock: 0.5.502 -> 0.5.600

Validation

• uv lock --check
• uv build

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.01%. Comparing base (44933f7) to head (9773ecb).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #416   +/-   ##
=======================================
  Coverage   84.01%   84.01%           
=======================================
  Files         157      157           
  Lines       11160    11160           
  Branches     1536     1536           
=======================================
  Hits         9376     9376           
  Misses       1374     1374           
  Partials      410      410           

Flag	Coverage Δ
backend	84.01% <ø> (ø)

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