feat: AI Worker 平台 MVP v1.0.0 - 多租户/项目管理/AI Worker/任务编排/HITL审核/成本治理

backend/app/models/artifact.py

@@ -0,0 +1,34 @@
+"""Artifact model - task deliverables with versioning."""
+from sqlalchemy import Column, String, Integer, Text, ForeignKey
+from app.models.base import Base, TimestampMixin, TenantMixin
+
+
+class Artifact(Base, TimestampMixin, TenantMixin):
+    """An artifact is a deliverable produced by a task.
+
+    Supports versioning: each task can have multiple artifact versions.
+    Type: text, code, document, data, image, mixed
+    """
+    __tablename__ = "artifacts"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    task_id = Column(Integer, ForeignKey("tasks.id"), nullable=False, index=True)
+    project_id = Column(Integer, ForeignKey("projects.id"), nullable=False)
+
+    title = Column(String(500), nullable=False)
+    content = Column(Text, default="")
+    artifact_type = Column(String(50), default="text")
+
+    # Versioning
+    version = Column(Integer, default=1)
+    is_latest = Column(String(10), default="true")
+
+    # Source attribution
+    created_by_user_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    created_by_worker_id = Column(Integer, ForeignKey("ai_workers.id"), nullable=True)
+
+    # Source references (for traceability - JSON array of source citations)
+    sources = Column(Text, default="[]")
+
+    def __repr__(self):
+        return f"<Artifact {self.title} v{self.version}>"