[+!] all but small

some small modifications, tests added

tests/test_source_validation.py

@@ -7,7 +7,9 @@ from pathlib import Path
 def test_all_python_sources_compile():
     """Проверяет синтаксис всех серверных модулей и клиента без запуска и записи pyc."""
     errors = []
-    for path in sorted((Path(__file__).parents[1] / "src").rglob("*.py")):
+    root = Path(__file__).parents[1]
+    paths = list((root / "src").rglob("*.py")) + list((root / "examples").rglob("*.py"))
+    for path in sorted(paths):
         try:
             compile(path.read_text(encoding="utf-8"), str(path), "exec")
         except SyntaxError as error: