Task flow engine implementation

api/models/workstream.py

@@ -1,21 +1,13 @@
-import enum
 import uuid
 from datetime import date
 
-from sqlalchemy import Date, Enum, ForeignKey, String, Text
+from sqlalchemy import Date, ForeignKey, String, Text
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from api.models.base import Base, TimestampMixin, new_uuid
 
 
-class WorkstreamStatus(str, enum.Enum):
-    active = "active"
-    blocked = "blocked"
-    completed = "completed"
-    archived = "archived"
-
-
 class Workstream(Base, TimestampMixin):
     __tablename__ = "workstreams"
 
@@ -28,8 +20,8 @@ class Workstream(Base, TimestampMixin):
     slug: Mapped[str] = mapped_column(String(100), unique=True, nullable=False, index=True)
     title: Mapped[str] = mapped_column(String(255), nullable=False)
     description: Mapped[str | None] = mapped_column(Text, nullable=True)
-    status: Mapped[WorkstreamStatus] = mapped_column(
-        Enum(WorkstreamStatus), nullable=False, default=WorkstreamStatus.active
+    status: Mapped[str] = mapped_column(
+        String(20), nullable=False, default="active", server_default="active"
     )
     owner: Mapped[str | None] = mapped_column(String(100), nullable=True)
     due_date: Mapped[date | None] = mapped_column(Date, nullable=True)