refactor: modify getPositionByName to perform case-insensitive search for position names

Author: pitzzahh

src/main/java/dao/impl/PositionDaoImpl.java

@@ -198,7 +198,7 @@ public CompletableFuture<Integer> countPositions() {
     @Override
     public CompletableFuture<Set<Position>> getPositionByName(String name) {
         return AsyncDaoExecutor.executeAsync(() -> {
-            try (Connection connection = getConnection(); PreparedStatement preparedStatement = connection.prepareStatement("SELECT * FROM positions WHERE name LIKE ?")) {
+            try (Connection connection = getConnection(); PreparedStatement preparedStatement = connection.prepareStatement("SELECT * FROM positions WHERE LOWER(name) LIKE LOWER(?)")) {
                 return getPositions(name, preparedStatement);
             }
         });