Implement FastAPI Temporal MVP pipeline

app/infra/db/models/workflow_step.py

@@ -0,0 +1,42 @@
+"""Workflow step ORM model."""
+
+from datetime import datetime
+from typing import Any
+
+from sqlalchemy import DateTime, Enum, ForeignKey, Integer, JSON, Text
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.domain.enums import StepStatus, WorkflowStepName
+from app.infra.db.base import Base, utc_now
+
+
+class WorkflowStepORM(Base):
+    """Persisted workflow step execution record."""
+
+    __tablename__ = "workflow_steps"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    workflow_run_id: Mapped[int] = mapped_column(
+        ForeignKey("workflow_runs.id"),
+        nullable=False,
+        index=True,
+    )
+    step_name: Mapped[WorkflowStepName] = mapped_column(
+        Enum(WorkflowStepName, native_enum=False),
+        nullable=False,
+    )
+    step_status: Mapped[StepStatus] = mapped_column(
+        Enum(StepStatus, native_enum=False),
+        nullable=False,
+    )
+    input_json: Mapped[dict[str, Any] | None] = mapped_column(JSON, nullable=True)
+    output_json: Mapped[dict[str, Any] | None] = mapped_column(JSON, nullable=True)
+    error_message: Mapped[str | None] = mapped_column(Text, nullable=True)
+    started_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        default=utc_now,
+        nullable=False,
+    )
+    ended_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+
+    workflow_run = relationship("WorkflowRunORM", back_populates="steps")