Document best practices for using ‎`uvicorn` API server on Kubernetes

[jason810496]

Body

• depends on: Add gunicorn support for API server with rolling worker restarts #60940
• detail context in: Add gunicorn support for API server with rolling worker restarts #60940 (comment)

When running the Airflow API server with the default ‎uvicorn mode on Kubernetes, users may still want a strategy to periodically restart pods to avoid long‑lived process issues (e.g. memory growth, stale state), especially since ‎uvicorn does not support rolling worker restarts like the new ‎gunicorn mode.

We should:

• Extend ‎airflow-core/docs/administration-and-deployment/web-stack.rst to document:
  • Best practices for running the API server with ‎uvicorn on Kubernetes.
  • Example approaches for periodically restarting API server pods (e.g. cluster‑level mechanisms, rolling restarts) and when this is recommended vs. relying on Kubernetes OOM/restarts.
  • Cross‑link this section from any API server / web‑stack docs that discuss server types (‎server_type = uvicorn|gunicorn).

Committer

• I acknowledge that I am a maintainer/committer of the Apache Airflow project.

[abhijeets25012-tech]

I would like to contribute

[abhijeets25012-tech]

i have raised a pr all checks have passed only your review is required