Permanent deletion of patients/studies/series/instances does not consider only external retrievable instances (=no location records)

[gunterze]

Permanent deletion of patients/studies/series/instances does not consider only external retrievable instances (=no location records), causing failures like

2023-05-26 10:37:30,311 WARN  [org.dcm4chee.arc.delete.impl.DeletionServiceImpl] (default task-4) Failed to delete Patient[pk=14, id=[-1252886998], name=PAPAYA^P] from database:
: javax.ejb.EJBTransactionRolledbackException: javax.transaction.RollbackException: ARJUNA016053: Could not commit transaction.
...
Caused by: org.postgresql.util.PSQLException: ERROR: update or delete on table "patient" violates foreign key constraint "fk_e3fdaqhw7u60trs5aspf4sna9" on table "study"
  Detail: Key (pk)=(14) is still referenced from table "study".
        at org.postgresql@42.4.1//org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2676)
        at org.postgresql@42.4.1//org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2366)
        at org.postgresql@42.4.1//org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:356)
        at org.postgresql@42.4.1//org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:490)
        at org.postgresql@42.4.1//org.postgresql.jdbc.PgStatement.execute(PgStatement.java:408)
        at org.postgresql@42.4.1//org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:181)
        at org.postgresql@42.4.1//org.postgresql.jdbc.PgPreparedStatement.executeUpdate(PgPreparedStatement.java:149)
        at org.jboss.ironjacamar.jdbcadapters@1.5.3.Final//org.jboss.jca.adapters.jdbc.WrappedPreparedStatement.executeUpdate(WrappedPreparedStatement.java:537)
        at org.hibernate@5.3.28.Final//org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:175)