Add SessionIdentifier class

DataHandler.py

@@ -7,4 +7,14 @@ class DataHandler(ABC):
         self.invalidDriverId = "NO_DRIVER"
         self.activateDebugOvertakeAnalysis = False
         self.slickCompounds = ('SOFT', 'MEDIUM', 'HARD')
-        self.countOutPitstops = True
\ No newline at end of file
+        self.countOutPitstops = True
+
+class SessionIdentifier:
+    year: int
+    event: int | str
+    sessionType: str
+
+    def __init__(self, year: int, event: int | str, sessionType: str = "R"):
+        self.year = year
+        self.event = event
+        self.sessionType = sessionType
\ No newline at end of file