Added install hints to pass install requirements

Details:
- Replaced python call to directory-validator.py with direct 'dirval' command
- Updated error message accordingly
- Added dirval as dependency in requirements.yml

Conversation: https://chatgpt.com/share/68c31763-6a84-800f-a697-50fa40e9841b

Makefile

@@ -2,3 +2,11 @@
 
 test:
 	python -m unittest discover -s tests/unit -p "test_*.py"
+
+install:
+	@echo ">> Installation instructions:"
+	@echo "   This software can be installed with pkgmgr under the alias 'baudolo':"
+	@echo "     pkgmgr install baudolo"
+	@echo ""
+	@echo "   📦 pkgmgr project page:"
+	@echo "     https://github.com/kevinveenbirkenbach/package-manager"

backup-docker-to-local.py

@@ -77,15 +77,12 @@ def get_instance(container):
 
 def stamp_directory():
     """Stamp a directory using directory-validator."""
-    stamp_command = (
-        f"python {SCRIPTS_DIRECTORY}/directory-validator/"
-        f"directory-validator.py --stamp {VERSION_DIR}"
-    )
+    stamp_command = f"dirval {VERSION_DIR} --stamp"
     try:
         execute_shell_command(stamp_command)
         print(f"Successfully stamped directory: {VERSION_DIR}")
     except BackupException as e:
-        print(f"Error stamping directory {VERSION_DIR}: {e}")
+        print(f"Error running 'dirval' for {VERSION_DIR}: {e}")
         exit(1)
 
 def backup_database(container, volume_dir, db_type):

requirements.yml

@@ -1,3 +1,5 @@
 pacman:
   - lsof
   - python-pandas
+pkgmgr:
+  - dirval