PMT-32: Add missing fields to Employee Entity

src/main/java/de/hmmh/pmt/db/Project.java

@@ -26,6 +26,16 @@ public final class Project {
     @Size(min = 3, max = 64)
     private String name;
 
+    @NotBlank
+    @Size(min = 10)
+    private String goal;
+
+    @NotNull
+    private Long customerId;
+
+    @NotNull
+    private Long administratorId; // Is an Employee
+
     @NotNull
     private LocalDateTime start;