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

app/models/organization_member.py

@@ -0,0 +1,59 @@
+"""Organization member ORM model."""
+from __future__ import annotations
+
+from datetime import datetime
+from enum import StrEnum
+
+from pydantic import BaseModel, ConfigDict
+from sqlalchemy import DateTime, Enum as SqlEnum, ForeignKey, Integer, UniqueConstraint, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.base import Base
+
+
+class OrganizationRole(StrEnum):
+    OWNER = "owner"
+    ADMIN = "admin"
+    MANAGER = "manager"
+    MEMBER = "member"
+
+
+class OrganizationMember(Base):
+    """Links users to organizations with role-based access."""
+
+    __tablename__ = "organization_members"
+    __table_args__ = (
+        UniqueConstraint("organization_id", "user_id", name="uq_organization_member"),
+    )
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    organization_id: Mapped[int] = mapped_column(ForeignKey("organizations.id", ondelete="CASCADE"))
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"))
+    role: Mapped[OrganizationRole] = mapped_column(
+        SqlEnum(OrganizationRole, name="organization_role"),
+        nullable=False,
+        default=OrganizationRole.MEMBER,
+    )
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), server_default=func.now(), nullable=False
+    )
+
+    organization = relationship("Organization", back_populates="members")
+    user = relationship("User", back_populates="memberships")
+
+
+class OrganizationMemberBase(BaseModel):
+    organization_id: int
+    user_id: int
+    role: OrganizationRole
+
+
+class OrganizationMemberCreate(OrganizationMemberBase):
+    pass
+
+
+class OrganizationMemberRead(OrganizationMemberBase):
+    id: int
+    created_at: datetime
+
+    model_config = ConfigDict(from_attributes=True)