Prepare Python client dependencies for v0.0.12

[terjekv]

Summary

• refresh the complete Python dependency graph, including basedpyright 1.39.10
• update setup-uv to 10.0.1 and pin every GitHub Action to its immutable release commit
• move local and CI integration coverage from REST v0.0.11 to the published v0.0.12 image
• synchronize the README and changelog

Rationale

The release should be cut from a green commit that already contains current dependencies, immutable workflow inputs, and proof of compatibility with the REST release it targets.

Compatibility

The runtime HTTPX constraint and public Python API are unchanged. Python 3.12 remains the minimum supported interpreter.

Verification

• pyright and basedpyright
• 54 unit tests
• 29 Compose-backed integration tests against REST v0.0.12
• package source and wheel builds
• Markdown lint
• dependency graph outdated check

[codspeed]

Merging this PR will not alter performance

✅ 31 untouched benchmarks

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_{Comparing chore/prepare-v0.0.12 (4da72d4) with main (44a31d0)}