Added SheerkaComparisonManager

src/core/sheerka/services/sheerka_service.py

@@ -0,0 +1,14 @@
+from dataclasses import dataclass
+
+
+@dataclass
+class ServiceObj:
+    event_id: str  # event where the object is created / modified
+
+
+class BaseService:
+    """
+    Base class for services
+    """
+    def __init__(self, sheerka):
+        self.sheerka = sheerka