fix roles privileges not being populated

[Sandalorian]

The roles analyst and investigator are not populated with privileges because of the following error

2026-07-21 12:10:15.781 ERROR 1 --- [           main] c.g.neo4j.config.GraphDatabaseImport     : Failed to grant access privilege to role 'investigator': Database 'cases' does not exist.
2026-07-21 12:10:16.021 ERROR 1 --- [           main] c.g.neo4j.config.GraphDatabaseImport     : Failed to grant access privilege to role 'analyst': Database 'cases' does not exist.
2026-07-21 12:10:16.022  INFO 1 --- [           main] c.g.neo4j.config.Neo4jConfigRunner       : Ended command line application

This PR changes the permissions so they are created against the movies database.