Bring over AABB bht work (model + validation + healer tests) from cf200f0

.metadata/.plugins/org.eclipse.core.resources/.projects/CityDoctorValidation/org.eclipse.egit.core/GitProjectData.properties

+#GitProjectData
+#Thu Jun 12 17:29:08 CEST 2025
+.gitdir=../../.git

.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/history.version

+
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.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/properties.version

+

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.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.ant.ui.prefs

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.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.core.resources.prefs

+description.autobuilding=false
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.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.debug.ui.prefs

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+preferredTargets=default\:default|

.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.egit.core.prefs

+GitRepositoriesView.GitDirectories=C\:\\Users\\T470\\eclipse-workspace\\aabbTree\\citydoctor2\\.git;
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.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.core.prefs

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.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.junit.prefs

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.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.launching.prefs

+eclipse.preferences.version=1
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.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.ui.prefs

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.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jsch.core.prefs

+eclipse.preferences.version=1
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