Update Ironbank

This MR contains the following updates:

Package	Update	Change
bb-common	minor	1.3.1 → 1.5.0
gluon	patch	1.1.3 → 1.1.6
registry1.dso.mil/ironbank/sonarsource/sonarqube/sonarqube-community-build (source)	minor	26.7.0.124771-community → 26.8.0.126808-community
registry1.dso.mil/ironbank/sonarsource/sonarqube/sonarqube-community-build (source)	minor	26.7.0.124771 → 26.8.0.126808
sonarqube (source)	patch	2026.4.0 → 2026.4.1

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• Followed upgrade instructions outlined in docs/DEVELOPMENT_MAINTENANCE.md
• Update Docs with new/updated steps as needed
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Release Notes

SonarSource/helm-chart-sonarqube (sonarqube)

v2026.4.1

What's Changed

• SONAR-31124 Fix GCP Marketplace test (2026.4) by @​hatem-amairi-sonarsource in #​903
• REL-4835 Release SQS 2026.4.1 by @​navyatejaotturu-sonarsource in #​908

Full Changelog: https://github.com/SonarSource/helm-chart-sonarqube/compare/sonarqube-2026.4.0-sonarqube-dce-2026.4.0...sonarqube-2026.4.1-sonarqube-dce-2026.4.1

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Linked Issues

Closes #223 (closed)

Upgrade Notices

PostgreSQL support for versions 15-18

Support for PostgreSQL versions is now from 15 to 18. Support for version 14 has been removed.

SonarQube Community Build includes Elasticsearch 9.x

SonarQube Community Build 26.8 and later includes Elasticsearch 9 (9.4.3). Upgrading to Elasticsearch 9 triggers a full re-index. Because Lucene 10 cannot read the previous on-disk format, the index is rebuilt from scratch into a fresh es9 subdirectory. Your configured index location is preserved, but its contents are regenerated.