Add initial project

backend/schemas/workout_session.py

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+"""WorkoutSession Pydantic schemas."""
+from pydantic import BaseModel
+from typing import Optional
+from datetime import datetime
+
+
+class WorkoutSessionBase(BaseModel):
+    """Base schema for workout session."""
+    start_time: datetime
+    end_time: Optional[datetime] = None
+    activity_type: str
+    activity_type_id: Optional[int] = None
+    duration_seconds: int = 0
+    distance_meters: float = 0.0
+    calories: float = 0.0
+    avg_pace: Optional[float] = None
+    max_pace: Optional[float] = None
+    min_pace: Optional[float] = None
+    avg_hr: Optional[int] = None
+    max_hr: Optional[int] = None
+    min_hr: Optional[int] = None
+    notes: Optional[str] = None
+
+
+class WorkoutSessionCreate(WorkoutSessionBase):
+    """Schema for creating a workout session."""
+    pass
+
+
+class WorkoutSessionResponse(WorkoutSessionBase):
+    """Schema for workout session response."""
+    id: int
+    user_id: int
+
+    class Config:
+        from_attributes = True