Meltano

<https://github.com/meltano/meltano/pull/10393|#10393 build: Declare support for Python 3.15>
Pull request opened by <https://github.com/edgarrmondragon|edgarrmondragon>
*Description*

SSIA. CPython 3.15 is out today: <https://blog.python.org/2026/10/python-3150-final-is-here/|https://blog.python.org/2026/10/python-3150-final-is-here/>.

*Checklist*

• I have read the <https://docs.meltano.com/contribute/merge/|contribution guide>

*Was generative AI tooling used to co-author this PR?*

No.

*Related Issues*

• Closes #XXXX

*Summary by Sourcery*

Declare support for Python 3.15 across project metadata, CI coverage, and documentation.
Enhancements:
• Declare Python 3.15 as a supported runtime across project metadata and user-facing installation guidance.
Build:
• Expand the build matrix to test Python 3.15, including slim image variants.
Documentation:
• Update installation and migration documentation to reflect Python 3.15 support and simplify supported-version wording.
<https://github.com/meltano/meltano|meltano/meltano>

<https://github.com/meltano/meltano/pull/10393|#10393 build: Declare support for Python 3.15>
Pull request ready for review by <https://github.com/edgarrmondragon|edgarrmondragon>
<https://github.com/meltano/meltano|meltano/meltano>

<https://github.com/meltano/meltano/pull/10393|#10393 build: Declare support for Python 3.15>
Pull request merged by <https://github.com/edgarrmondragon|edgarrmondragon>
<https://github.com/meltano/meltano|meltano/meltano>