chore(airflow): Update patch versions for 25.11.0

[Techassi]

Part of #1267.

• Add: 3.0.6 (LTS)
• Deprecate: 2.10.5
• Remove: 2.10.4

Tip

Please add the scheduled-for/25.11.0 label, add to the Stackable Engineering project.

Update tasks

• Update boil-config.toml to reflect the agreed upon versions in the spreadsheet (including the removal of old versions).
• Download new constraints file (see airflow/download_constraints.sh).
• Update other dependencies if applicable (eg: python, statsd_exporter, cyclonedx-bom, etc).
• Check other operators (getting_started / kuttl / supported-versions) for usage of the versions. Add the PR(s) to the list below.
• Ensure prerequisites are up to date (required-external-components.adoc).
• Update the version in demos. Add the PR(s) to the list below.

Related Pull Requests

Tip

Delete any items that do not apply so that all applicable items can be checked.
For example, if you add release notes to the documentation repository, you do not need the latter two criteria.

• chore: Airflow - changes to patch versions for 25.11 #1278
• chore: Update patch versions for 25.11 airflow-operator#692
• chore: Bump airflow version to 3.0.6 demos#303
• Link to the Release Notes PR in the documentation repo (if not a comment below)

Acceptance

Tip

This list should be completed by the assignee(s), once respective PRs have been merged. Once all items have been
checked, the issue can be moved into Development: Done.

• Can build image (either locally, or in CI)
• Kuttl smoke tests passes (either locally, or in CI)
• Release notes added to documentation and linked as a PR above
• Release notes written in a comment below
• Applicable release-note label added to this issue

Testing instructions

# Where x.y.z is the new version added in this PR
boil build airflow=x.y.z --strip-architecture --load

kind load docker-image oci.stackable.tech/sdp/airflow:x.y.z-stackable0.0.0-dev

# Change directory into the airflow-operator repository and update the
# product version in tests/test-definition.yaml
./scripts/run-tests --test-suite smoke-latest # or similar

Please consider updating this template if these instructions are wrong, or
could be made clearer.