docs(release): 2.1.0 notes — modern-di 2.25 integration seams adoption

planning/releases/2.1.0.md

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+# modern-di-aiohttp 2.1.0 — adopt the modern-di 2.25 integration seams
+
+Internal refactor, no behavior or API change: the integration now calls the
+blessed `Container` seams instead of reaching into internals.
+
+## Internal refactors
+
+- **`container.add_providers(...)` replaces the `providers_registry` reach-in.**
+  `setup_di` now registers the connection providers via
+  `container.add_providers(*_CONNECTION_PROVIDERS)` instead of
+  `container.providers_registry.add_providers(...)`.
+- **`container.resolve_dependency(...)` replaces the marker-dispatch
+  `isinstance` check.** `_resolve_di_params` now delegates provider-or-type
+  dispatch to `Container.resolve_dependency` instead of re-implementing the
+  `isinstance(marker.dependency, providers.AbstractProvider)` branch.
+
+## Packaging
+
+- Bumps the `modern-di` floor to `>=2.25.0,<3` (from `>=2.21.0,<3`), the
+  release that adds these seams
+  ([modern-python/modern-di#283](https://github.com/modern-python/modern-di/pull/283)).
+
+## Downstream
+
+No action needed beyond picking up the new floor — no public API changed.
+
+## Internals
+
+- 100% line coverage; `ruff`, `ty`, and `eof-fixer` clean across Python
+  3.10–3.14.