Release notes for 0.4.0

planning/releases/0.4.0.md

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+# faststream-redis-timers 0.4.0 — Python 3.11 & 3.12 support
+
+The supported-Python floor drops from 3.13 to **3.11**, so the package now
+installs and runs on 3.11, 3.12, 3.13, and 3.14. This release also fixes a
+start-up task leak found while adding the wider CI matrix.
+
+## Python 3.11 & 3.12 support
+
+- `requires-python` lowered to `>=3.11,<4`; 3.11 and 3.12 classifiers added.
+- Two 3.12-only constructs are backported via `typing-extensions` (now a direct
+  dependency, `>=4.12.0`): the `@override` decorators and the `RedisClient` type
+  alias (the latter via `typing.TypeAlias`, stdlib since 3.10). `typing.Self` and
+  `datetime.UTC` already exist in the 3.11 stdlib and are unchanged.
+- CI now runs the full test suite on all four interpreters (3.11–3.14).
+- No public-API change. The package is pure-Python; this is a compatibility and
+  packaging change for everyone already on 3.13/3.14, and a new option for
+  3.11/3.12 users.
+
+## Bug fix
+
+- **Failed broker start no longer orphans the poll task.** When `start()` timed
+  out (`start_timeout` elapsed before the subscriber signalled ready), the
+  background `_consume` poll task it had already spawned was left running,
+  holding a Redis connection. On slow runners this could deadlock teardown.
+  `start()` now cancels and awaits that task before re-raising, so a failed start
+  leaves nothing behind. Covered by a deterministic regression test.
+
+## Downstream
+
+Upgrading is a drop-in. If you were pinned to Python 3.13+ only because of this
+package, you can now run it on 3.11 or 3.12. `typing-extensions>=4.12.0` is
+pulled in automatically (it was already a transitive dependency via faststream).
+
+## Internals
+
+- 100% test coverage maintained (now 150 tests).