Inserts ubuntu26.04 build

Dockerfile-ubuntu26-qt6.dockerfile

@@ -91,10 +91,11 @@ RUN python3 -m venv /opt/venv \
     && /opt/venv/bin/pip install aqtinstall
 
 # Install Qt6 via aqtinstall with required modules
+# Note: Qt6Location requires Qt6Positioning as dependency
 RUN set -eux; \
     mkdir -p "${QT_BASE_DIR}" \
     && /opt/venv/bin/python -m aqt install-qt linux desktop "${QT_VERSION}" "${QT_ARCH}" \
-        -m qtmultimedia qtserialport qtimageformats qtwebsockets qtpdf qtwebview \
+        -m qtmultimedia qtserialport qtimageformats qtwebsockets qtpdf qtwebview qtlocation qtpositioning \
         --outputdir "${QT_BASE_DIR}" \
     && test -f "${QT_ROOT}/lib/cmake/Qt6/Qt6Config.cmake"
 
@@ -139,22 +140,19 @@ RUN apt-get update \
 
 # Add RPM/rpmbuild tools for make_rpm.py
 # Note: Ubuntu uses different package names than openSUSE/Fedora
-# - rpm: provides rpmbuild command
-# - rpm-common: provides RPM macros and build infrastructure
+# - rpm: provides rpmbuild command and basic infrastructure
 # - rpmdevtools is NOT available on Ubuntu, we create directory structure manually
 RUN apt-get update \
-    && apt-get install -y --no-install-recommends rpm rpm-common librpmbuild9 \
+    && apt-get install -y --no-install-recommends rpm \
     && rm -rf /var/lib/apt/lists/*
 
 # Setup rpmbuild directory structure (normally done by rpmdev-setuptree on Fedora/openSUSE)
 RUN mkdir -p /shd/CTC/TOOLS/rpmbuild/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS} \
     && chown -R ctc:ctc /shd/CTC/TOOLS/rpmbuild
 
-# Copy RTI Connext DDS (proprietary, must be provided externally)
-# RTI is copied from ./external/rti_connext_dds-7.7.0 in the repository
-COPY external/rti_connext_dds-7.7.0 /opt/RTI
-
-# Set DDS_PATH for RTI discovery
+# RTI Connext DDS (proprietary) should be mounted at runtime:
+# docker run -v /path/to/rti:/opt/RTI ...
+# Set DDS_PATH for RTI discovery (will be used if RTI is mounted)
 ENV DDS_PATH=/opt/RTI
 
 # Cleanup