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

app/models/organization.py

@@ -0,0 +1,45 @@
+"""Organization ORM model and schemas."""
+from __future__ import annotations
+
+from datetime import datetime
+
+from pydantic import BaseModel, ConfigDict
+from sqlalchemy import DateTime, Integer, String, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.base import Base
+
+
+class Organization(Base):
+    """Represents a CRM organization/workspace."""
+
+    __tablename__ = "organizations"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
+    name: Mapped[str] = mapped_column(String(255), nullable=False, unique=True)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), server_default=func.now(), nullable=False
+    )
+
+    members = relationship(
+        "OrganizationMember",
+        back_populates="organization",
+        cascade="all, delete-orphan",
+    )
+    contacts = relationship("Contact", back_populates="organization", cascade="all, delete-orphan")
+    deals = relationship("Deal", back_populates="organization", cascade="all, delete-orphan")
+
+
+class OrganizationBase(BaseModel):
+    name: str
+
+
+class OrganizationCreate(OrganizationBase):
+    pass
+
+
+class OrganizationRead(OrganizationBase):
+    id: int
+    created_at: datetime
+
+    model_config = ConfigDict(from_attributes=True)