Update dependency a2a-sdk to v1.1.2

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Confidence
a2a-sdk (changelog)	==1.0.3 → ==1.1.2

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Release Notes

a2aproject/a2a-python (a2a-sdk)

v1.1.2

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Features

• server: add aclose() to drain ActiveTask background tasks (#​1101) (#​1105) (9801f46)

Bug Fixes

• agent_execution: resolve ActiveTask 'destroyed but pending' warning during teardown (#​1122) (d19c4d2)
• persist early producer failure as FAILED with originating message (#​1106) (4e3d724)

v1.1.1

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Bug Fixes

• server: improve Swagger /docs example annotations for A2A routes (#​1092) (46b292b)

Miscellaneous Chores

• grpc: eliminate third-party grpcio-status dependency (#​1130) (723880e)
• http: eliminate httpx-sse dependency (#​1132) (0d82ab9)

v1.1.0

Compare Source

Features

• server: restore FastAPI /docs visibility for A2A routes (#​1024) (1122d4e)

Bug Fixes

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

Documentation

• clarify EventQueue usage (#​1066) (11dd68a)

Miscellaneous Chores

• release 1.1.0 (#​1088) (3058a33)

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[gemini-code-assist]

Code Review

This pull request updates the a2a-sdk dependency from version 1.0.3 to 1.1.2 in requirements.txt. There are no review comments, so I have no feedback to provide.