fix: propagate A2A request metadata into the run config in AgentExecutor#1345
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…utor` During A2A communication, `AgentExecutor` invoked the 4-argument `Runner.runAsync`, which hardcodes `stateDelta = null` and silently dropped the caller's incoming request metadata. Route the incoming request metadata (`RequestContext.getParams().metadata()`) into `RunConfig.customMetadata` under the `a2a_metadata` key, so downstream processing can read it. This mirrors ADK Python and Go, which pass A2A request metadata through the run config and leave the session state delta null, rather than writing framework IDs into session state. Add tests for the metadata and no-metadata cases. PiperOrigin-RevId: 946936540
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fix: propagate A2A request metadata into the run config in
AgentExecutorDuring A2A communication,
AgentExecutorinvoked the 4-argumentRunner.runAsync, which hardcodesstateDelta = nulland silently dropped thecaller's incoming request metadata.
Route the incoming request metadata (
RequestContext.getParams().metadata())into
RunConfig.customMetadataunder thea2a_metadatakey, so downstreamprocessing can read it. This mirrors ADK Python and Go, which pass A2A request
metadata through the run config and leave the session state delta null, rather
than writing framework IDs into session state. Add tests for the metadata and
no-metadata cases.