chore(deps): update keycloak to v26.5.4

This MR contains the following updates:

Package	Update	Change
bb-common	patch	0.14.0 -> 0.14.1
ironbank/opensource/keycloak/keycloak (source)	patch	26.5.3 -> 26.5.4
postgresql (source)	minor	18.2.6 -> 18.4.0
registry1.dso.mil/ironbank/opensource/keycloak/keycloak (source)	patch	26.5.3 -> 26.5.4

Complete MR checklist

Assignee

• Followed upgrade instructions outlined in docs/DEVELOPMENT_MAINTENANCE.md
• Update Docs with new/updated steps as needed
• Tested and Validated Changes made with supporting info like logs or screenshots from test pipelines

Add supporting info below

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Linked Issue

Issue #286 (closed)

Reviewer only

• Tested and Validated changes

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Upgrade Notices

N/A