feat: implement initial structure for activities, analytics, auth, contacts, deals, organizations, tasks, and users APIs with placeholder endpoints

app/api/v1/contacts/__init__.py

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+"""Contacts API package."""
+from .views import router
+
+__all__ = ["router"]

app/api/v1/contacts/crud.py

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+"""Contacts CRUD placeholder."""

app/api/v1/contacts/models.py

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+"""Contact API schemas."""
+from __future__ import annotations
+
+from pydantic import BaseModel, EmailStr
+
+
+class ContactCreatePayload(BaseModel):
+    name: str
+    email: EmailStr | None = None
+    phone: str | None = None

app/api/v1/contacts/views.py

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+"""Contact API stubs required by the spec."""
+from __future__ import annotations
+
+from fastapi import APIRouter, Query, status
+
+from .models import ContactCreatePayload
+
+router = APIRouter(prefix="/contacts", tags=["contacts"])
+
+
+def _stub(endpoint: str) -> dict[str, str]:
+    return {"detail": f"{endpoint} is not implemented yet"}
+
+
+@router.get("/", status_code=status.HTTP_501_NOT_IMPLEMENTED)
+async def list_contacts(
+    page: int = Query(1, ge=1),
+    page_size: int = Query(20, ge=1, le=100),
+    search: str | None = None,
+    owner_id: int | None = None,
+) -> dict[str, str]:
+    """Placeholder list endpoint supporting the required filters."""
+    return _stub("GET /contacts")
+
+
+@router.post("/", status_code=status.HTTP_501_NOT_IMPLEMENTED)
+async def create_contact(payload: ContactCreatePayload) -> dict[str, str]:
+    """Placeholder for creating a contact within the current organization."""
+    _ = payload
+    return _stub("POST /contacts")