Fix wsssh-server Debian package build issues

- Removed redundant debian/compat file (compatibility level already specified in control)
- Fixed debhelper compatibility conflict error
- Modified debian/rules to reuse existing wssshd binary from dist/ directory
- Updated override_dh_auto_build to check for existing binary and copy instead of rebuild
- Modified override_dh_auto_clean to preserve dist directory
- Eliminates unnecessary rebuilds and improves build efficiency
- Resolves both compatibility and binary reuse issues

wsssh-server/debian/compat

-13
\ No newline at end of file

wsssh-server/debian/rules

@@ -88,9 +88,15 @@ override_dh_auto_configure:
 	@echo ')' >> wssshd.spec
 
 override_dh_auto_build:
-	# Build PyInstaller binary
-	pip3 install pyinstaller
-	pyinstaller --clean --onefile wssshd.spec
+	# Check if wssshd binary already exists in dist directory
+	if [ -f ../dist/wssshd ]; then \
+		echo "Using existing wssshd binary from ../dist/wssshd"; \
+		cp ../dist/wssshd dist/wssshd; \
+	else \
+		echo "Building PyInstaller binary"; \
+		pip3 install pyinstaller; \
+		pyinstaller --clean --onefile wssshd.spec; \
+	fi
 
 override_dh_auto_install:
 	# Install PyInstaller binary
@@ -118,5 +124,6 @@ override_dh_auto_install:
 	mkdir -p debian/wsssh-server/etc/wssshd
 
 override_dh_auto_clean:
-	rm -rf build dist *.spec
+	rm -rf build *.spec
+	# Don't clean dist directory to preserve existing wssshd binary
 	dh_auto_clean
\ No newline at end of file