Add `DjangoAtomicIntegration` from `getsentry/sentry`

### Problem Statement

.

### Solution Brainstorm

.

The issue names only DjangoAtomicIntegration and provides no files, tests, entry points, or acceptance criteria. Start by identifying the expected integration scope and comparing it with relevant existing integrations; done cannot be determined until the required behavior and validation are specified.

索引モデルが issue の本文から書いたものです。