chore: [ANDROSDK-2332] migrate maintenance domain models to Kotlin

[taridepaco]

Migrates the maintenance domain models ForeignKeyViolation and D2Error from Java AutoValue classes to Kotlin data classes built with the @ModelBuilder KSP annotation. Java-style accessor methods, the builder()/toBuilder() API and D2Error.isOffline are all preserved, so existing call sites and the public API surface are unchanged.

D2Error exposed two limitations in the @ModelBuilder processor that are also fixed here: typealiased field types (it extends Exception) were rendered as [typealias Exception] and produced uncompilable builders, and computed properties (such as the derived isOffline) were being treated as builder fields. The processor now renders typealiases correctly and only treats primary-constructor parameters as model fields. The two conditional defaults from the old D2Error.build() (errorCode and created) move into the builder() factory.

Related task: ANDROSDK-2332

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
83.9% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud