first commit

backend/app/models/task.py

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+"""Collection Task model"""
+
+from sqlalchemy import Column, DateTime, Integer, String, Text
+from sqlalchemy.sql import func
+
+from app.db.session import Base
+
+
+class CollectionTask(Base):
+    __tablename__ = "collection_tasks"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    datasource_id = Column(Integer, nullable=False, index=True)
+    status = Column(String(20), nullable=False)  # pending, running, success, failed, cancelled
+    started_at = Column(DateTime(timezone=True))
+    completed_at = Column(DateTime(timezone=True))
+    records_processed = Column(Integer, default=0)
+    error_message = Column(Text)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+    def __repr__(self):
+        return f"<CollectionTask {self.id}: {self.status}>"