chore(main): release 1.1.0 (a2aproject#1073)

🤖 I have created a release *beep* *boop*
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##
[1.1.0](a2aproject/a2a-python@v1.0.3...v1.1.0)
(2026-05-29)


### Features

* **server:** restore FastAPI /docs visibility for A2A routes
([a2aproject#1024](a2aproject#1024))
([1122d4e](a2aproject@1122d4e))


### Bug Fixes

* **compat:** remove ListTasks from v0.3 REST adapter
([a2aproject#1043](a2aproject#1043))
([a2aproject#1068](a2aproject#1068))
([5c88793](a2aproject@5c88793))
* properly convert metadata to dict in `RequestContext.metadata`
([a2aproject#1081](a2aproject#1081))
([d2f2e18](a2aproject@d2f2e18))
* raise on append=True for unknown artifact_id
([a2aproject#1038](a2aproject#1038))
([a2aproject#1077](a2aproject#1077))
([fe1f24b](a2aproject@fe1f24b))
* release reference count on non-terminal exit to prevent stale registry
entries ([a2aproject#1079](a2aproject#1079))
([501255c](a2aproject@501255c))
* **server:** preserve non-ASCII characters in streaming JSON responses
([a2aproject#1080](a2aproject#1080))
([d46c6f9](a2aproject@d46c6f9))
* **telemetry:** don't mark QueueShutDown as an error span
([a2aproject#1075](a2aproject#1075))
([54a485c](a2aproject@54a485c))


### Documentation

* clarify `EventQueue` usage
([a2aproject#1066](a2aproject#1066))
([11dd68a](a2aproject@11dd68a))


### Miscellaneous Chores

* release 1.1.0
([a2aproject#1088](a2aproject#1088))
([3058a33](a2aproject@3058a33))

---
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Please](https://github.com/googleapis/release-please). See
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