Add Pydantic models for Goal Tracker module

modules/goal_tracker/models.py

@@ -0,0 +1,23 @@
+from pydantic import BaseModel
+from typing import Optional
+from datetime import datetime
+
+class GoalBase(BaseModel):
+    title: str
+    description: Optional[str] = ""
+    target_date: Optional[datetime] = None
+
+class GoalCreate(GoalBase):
+    pass
+
+class GoalUpdate(GoalBase):
+    title: Optional[str] = None
+
+class GoalInDB(GoalBase):
+    id: str
+    user_id: str
+    created_at: datetime
+    updated_at: datetime
+
+class GoalList(BaseModel):
+    goals: list[GoalInDB]