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

app/models/user.py

@@ -2,13 +2,17 @@
 from __future__ import annotations
 
 from datetime import datetime
+from typing import TYPE_CHECKING
 
 from pydantic import BaseModel, ConfigDict, EmailStr
 from sqlalchemy import Boolean, DateTime, Integer, String, func
-from sqlalchemy.orm import Mapped, mapped_column
+from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.models.base import Base
 
+if TYPE_CHECKING:  # pragma: no cover - circular imports only for typing
+    pass
+
 
 class User(Base):
     """SQLAlchemy model for application users."""
@@ -18,7 +22,7 @@ class User(Base):
     id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
     email: Mapped[str] = mapped_column(String(320), unique=True, index=True, nullable=False)
     hashed_password: Mapped[str] = mapped_column(String(255), nullable=False)
-    full_name: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    name: Mapped[str] = mapped_column(String(255), nullable=False)
     is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
     created_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), server_default=func.now(), nullable=False
@@ -27,12 +31,17 @@ class User(Base):
         DateTime(timezone=True), server_default=func.now(), onupdate=func.now(), nullable=False
     )
 
+    memberships = relationship("OrganizationMember", back_populates="user", cascade="all, delete-orphan")
+    owned_contacts = relationship("Contact", back_populates="owner")
+    owned_deals = relationship("Deal", back_populates="owner")
+    activities = relationship("Activity", back_populates="author")
+
 
 class UserBase(BaseModel):
     """Shared user fields for Pydantic schemas."""
 
     email: EmailStr
-    full_name: str | None = None
+    name: str
     is_active: bool = True