Filter availability by US_ACTIVE

Restricts the availability listing to projectmanagement.dbo.CP_USER
rows where US_ACTIVE = 1, so deactivated users are not returned.

server/src/CPATapi.Server/Repository/ZeitConsensRepository.cs

@@ -31,6 +31,7 @@ internal class ZeitConsensRepository(IConfiguration config) : Repository(config)
         ) buLast
         WHERE
           ma.MA_USER_AKTIV = 1
+          AND us.US_ACTIVE = 1
         """;
 
     public async Task<IEnumerable<Availability>> GetUsersAvailabilityAsync(DateTime from, DateTime to)