Add models for CRM entities: Activity, Contact, Deal, Organization, OrganizationMember, Task; update User model

app/models/task.py

@@ -0,0 +1,47 @@
+"""Task ORM model and schemas."""
+from __future__ import annotations
+
+from datetime import datetime
+
+from pydantic import BaseModel, ConfigDict
+from sqlalchemy import Boolean, DateTime, ForeignKey, Integer, Text, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.base import Base
+
+
+class Task(Base):
+    """Represents a task linked to a deal."""
+
+    __tablename__ = "tasks"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    deal_id: Mapped[int] = mapped_column(ForeignKey("deals.id", ondelete="CASCADE"))
+    title: Mapped[str] = mapped_column(Text, nullable=False)
+    description: Mapped[str | None] = mapped_column(Text, nullable=True)
+    due_date: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    is_done: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), server_default=func.now(), nullable=False
+    )
+
+    deal = relationship("Deal", back_populates="tasks")
+
+
+class TaskBase(BaseModel):
+    deal_id: int
+    title: str
+    description: str | None = None
+    due_date: datetime | None = None
+    is_done: bool = False
+
+
+class TaskCreate(TaskBase):
+    pass
+
+
+class TaskRead(TaskBase):
+    id: int
+    created_at: datetime
+
+    model_config = ConfigDict(from_attributes=True)