refactor: split schemas.py into schemas/ package

backend/schemas/operations.py

@@ -0,0 +1,55 @@
+from pydantic import BaseModel
+from typing import Optional, List
+from datetime import datetime
+
+
+# --- Operations (Check-in/Check-out Validation) ---
+class OperationCreate(BaseModel):
+    barcode: str
+    quantity: float
+    user_id: int
+
+
+class BulkOperationCreate(BaseModel):
+    user_id: int
+    items: List[OperationCreate]
+
+
+class TrashOperationCreate(BaseModel):
+    barcode: str
+    quantity: float
+    user_id: int
+    reason: Optional[str] = "unspecified"
+
+
+# --- Sync ---
+class SyncOperation(BaseModel):
+    type: str  # 'CHECK_IN', 'CHECK_OUT'
+    barcode: str
+    quantity: float
+    uuid: Optional[str] = None
+    timestamp: datetime
+
+
+class SyncPayload(BaseModel):
+    user_id: int
+    operations: List[SyncOperation]
+
+
+# --- Audit Logs ---
+class AuditLogResponse(BaseModel):
+    id: int
+    timestamp: datetime
+    user_id: int
+    username: Optional[str] = None
+    action: str
+    target_item_id: Optional[int]
+    target_item_name: Optional[str] = None
+    target_item_pn: Optional[str] = None
+    target_item_barcode: Optional[str] = None
+    target_snapshot: Optional[str] = None
+    quantity_change: Optional[float]
+    details: Optional[str] = None
+
+    class Config:
+        from_attributes = True