build: release 5.10.0

[mostlyai-ci]

Release version 5.10.0.

---

Note

Publishes the 5.10.0 release by updating package version fields.

• Update __version__ in mostlyai/sdk/__init__.py from 5.9.2 to 5.10.0
• Update version in pyproject.toml from 5.9.2 to 5.10.0

^{Written by Cursor Bugbot for commit 4cb5ede. This will update automatically on new commits. Configure here.}

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[cursor]

Lock file version not updated with release

Low Severity

The version in pyproject.toml and mostlyai/sdk/__init__.py was updated to 5.10.0, but the uv.lock file still contains version 5.9.2 for the mostlyai package (at line 3801). This creates an inconsistency that didn't exist before this commit, where the lock file no longer matches the declared package version. The lock file typically needs to be regenerated when the package version changes to maintain consistency.