Fix shellcheck warnings in entrypoint scripts

- Add shellcheck disable=SC1091 for dynamic source paths
- Quote INSTALLED_DIRECTORY variables to prevent word splitting
- Resolves all reported shellcheck issues in PR review

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

docker/files/docker-entrypoint-rootless.sh

@@ -54,6 +54,7 @@ fi
 # The container runs as the specified user from the start
 EXEC=""
 # Setup ARM64 emulation support
+# shellcheck disable=SC1091
 source "${INSTALLED_DIRECTORY}/setup-exec.sh"
 
 # Update config path

docker/files/docker-entrypoint.sh

@@ -41,10 +41,10 @@ if [[ $NRTMPSAVES -gt 0 ]]; then
 fi
 
 if [[ ${UPDATE_MODS_ON_START:-} == "true" ]]; then
-  ${INSTALLED_DIRECTORY}/docker-update-mods.sh
+  "${INSTALLED_DIRECTORY}"/docker-update-mods.sh
 fi
 
-${INSTALLED_DIRECTORY}/docker-dlc.sh
+"${INSTALLED_DIRECTORY}"/docker-dlc.sh
 
 EXEC=""
 if [[ $(id -u) == 0 ]]; then
@@ -58,6 +58,7 @@ if [[ $(id -u) == 0 ]]; then
 fi
 
 # Setup ARM64 emulation support
+# shellcheck disable=SC1091
 source "${INSTALLED_DIRECTORY}/setup-exec.sh"
 
 sed -i '/write-data=/c\write-data=\/factorio/' /opt/factorio/config/config.ini

docker/files/scenario.sh

@@ -34,6 +34,7 @@ fi
 
 # Setup ARM64 emulation support
 EXEC=""
+# shellcheck disable=SC1091
 source "${INSTALLED_DIRECTORY}/setup-exec.sh"
 
 exec $EXEC /opt/factorio/bin/x64/factorio \

docker/files/scenario2map.sh

@@ -26,6 +26,7 @@ fi
 
 # Setup ARM64 emulation support
 EXEC=""
+# shellcheck disable=SC1091
 source "${INSTALLED_DIRECTORY}/setup-exec.sh"
 
 exec $EXEC /opt/factorio/bin/x64/factorio \