docs(release): add 2.2.0 release notes

planning/releases/2.2.0.md

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+# modern-di-aiohttp 2.2.0 — adopt the modern-di integration kit
+
+Maintenance release. **No public API change** — `FromDI`, `inject`,
+`setup_di`, `fetch_di_container`, `fetch_request_container`, and the
+connection providers keep their signatures and behavior. Swaps this
+package's hand-rolled connection dispatch and marker resolution for the
+shared primitives in
+[`modern_di.integrations`](https://github.com/modern-python/modern-di/blob/main/architecture/integration-kit.md),
+shipped in
+[modern-di 2.28.0](https://github.com/modern-python/modern-di/releases/tag/2.28.0).
+Fourth of 13 planned adapter conversions across the `modern-di` ecosystem
+(after
+[`modern-di-starlette` 2.2.0](https://github.com/modern-python/modern-di-starlette/releases/tag/2.2.0),
+[`modern-di-fastapi` 2.10.0](https://github.com/modern-python/modern-di-fastapi/releases/tag/2.10.0),
+and
+[`modern-di-litestar` 2.13.0](https://github.com/modern-python/modern-di-litestar/releases/tag/2.13.0)).
+
+## Internal refactors
+
+- **`_di_middleware` keeps its own `can_prepare()` handshake probe** to
+  select `aiohttp_websocket_provider` or `aiohttp_request_provider` — this
+  package is a documented outlier: both providers bind `web.Request` (a
+  WebSocket is an upgraded HTTP request at aiohttp's middleware entry
+  point), so `integrations.classify_connection`'s isinstance-over-tuple
+  dispatch cannot distinguish them. Once the provider is picked,
+  **`integrations.bind(provider, request)`** now derives the scope/context
+  the middleware used to hand-write. `bind()` never returns `None`, so no
+  fallback branch is needed.
+- **The child container's manual `try`/`finally: await
+  child_container.close_async()` is now `Container`'s own `async with`** —
+  entering an already-open container is a no-op; exiting closes it,
+  including on the exception path.
+- **`_FromDI`/`_parse_inject_params`/`_resolve_di_params` are gone.**
+  `FromDI = integrations.from_di`; `inject` now composes
+  `integrations.parse_markers`/`integrations.resolve_markers`.
+
+## Packaging
+
+- Bumps the `modern-di` floor to `>=2.28.0,<3`.
+
+## Downstream
+
+No action needed — the public API (`FromDI`, `inject`, `setup_di`,
+`fetch_di_container`, `fetch_request_container`,
+`aiohttp_request_provider`/`aiohttp_websocket_provider`) is unchanged.
+Upgrading only requires `modern-di>=2.28.0`.
+
+## Internals
+
+- 100% line coverage; `ruff`, `ty` clean across Python 3.10–3.14.
+- Built via `subagent-driven-development`: 5 planned tasks, each with an
+  independent spec+quality review; a whole-branch review before merge.