Qt6 Migration: Complete migration with DDS/RTI support and build validation

Major Changes:
- Merged latest Qt5 devel content from dlbo (292 files changed, 7 new dirs)
- Consolidated forward-declarations and include folders
- Removed unneeded modules per Niklas' repo check list

Build System Fixes:
- Fixed CMake VERSION_GREATER syntax in ParticipantManagement/CMakeLists.txt
- Added VLC packages (libvlc-dev, vlc-plugin-base) to docker_build.sh
- Added PostgreSQL dev packages (libpq-dev, postgresql-server-dev-all) to Dockerfile
- Fixed locale warnings (ANSI_X3.4-1968 → C.UTF-8)
- Fixed ArcGIS SDK path warnings when BUILD_ARCGIS=OFF

Code Generation Fixes:
- Fixed IDL enum collisions (PortType→CorePortType/DdsutPortType, PdmEventType)
- Fixed Grantlee template svc_translation.cpp.grantlee:
  - Changed {{ idl_enum.name }}_def:: to {{ idl_enum.name }}::
  - Fixed .underlying() calls for C++11 scoped enums (enum class)
- Removed generated files from repo (moc_*, *_dtc.h, *_ftc.h)

Validation:
- BUILD_RTI=ON: SUCCESS
- BUILD_RTI=OFF: SUCCESS
- C++17 standard maintained for RTI 7.7 compatibility
- Ubuntu 26.04 Docker environment verified

Remaining Warnings (expected):
- BgViewer, KDChart, KDReports, Poppler-Qt6 not found (optional features)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt5-before/dlbo/Lts/Tests/DatabaseInitialisation/test_exm_exercise.sql

@@ -0,0 +1,46 @@
+-- # $Id$
+-- # $HeadURL$
+-- # $Author$
+
+\set ON_ERROR_STOP
+
+-- Create User for ex 35
+SELECT create_user_if_not_exists('ets_ex_00');
+
+-- Schema ex_35
+CREATE SCHEMA IF NOT EXISTS ex_35;
+ALTER SCHEMA ex_35 OWNER TO ets_exm;
+GRANT USAGE ON SCHEMA ex_35 TO ets_ro;
+GRANT ALL ON SCHEMA ex_35 TO ets_admin;
+
+-- Create User for ex 42
+-- SELECT create_user_if_not_exists('ets_ex_00');
+
+-- Schema ex_42
+CREATE SCHEMA IF NOT EXISTS ex_42;
+ALTER SCHEMA ex_42 OWNER TO ets_exm;
+GRANT USAGE ON SCHEMA ex_42 TO ets_ro;
+GRANT ALL ON SCHEMA ex_42 TO ets_admin;
+
+-- table db_version
+SET SEARCH_PATH TO ex_35;
+CREATE TABLE IF NOT EXISTS db_version (
+  id            serial,
+  description   text,
+  version       text,
+  updated       bigint DEFAULT (extract(epoch from now()) * 1000),
+  success       boolean DEFAULT true,
+  message       text
+);
+-- INSERT INTO db_version (description, version) VALUES ('Create db_version table for all existent DB schemas', '1.00');
+
+SET SEARCH_PATH TO ex_42;
+CREATE TABLE IF NOT EXISTS db_version (
+  id            serial,
+  description   text,
+  version       text,
+  updated       bigint DEFAULT (extract(epoch from now()) * 1000),
+  success       boolean DEFAULT true,
+  message       text
+);
+-- INSERT INTO db_version (description, version) VALUES ('Create db_version table for all existent DB schemas', '1.00');