feat: add conference module

backend/app/conference/models.py

@@ -0,0 +1,24 @@
+from datetime import datetime
+from uuid import UUID
+
+from pydantic import BaseModel, ConfigDict
+
+
+class ConferenceAssignment(BaseModel):
+    """Holds information about a user's role, enrollment, and representation."""
+
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int | None = None
+    conference_id: int | None = None
+    user_id: UUID | None = None
+    name: str | None = None
+    email: str | None = None
+    institution: str | None = None
+    role: str
+    committee_id: int | None = None
+    representation_id: int | None = None
+    created_at: datetime | None = None
+
+
+