temporal-spring-ai: preserve Usage and RateLimit in ChatResponse metadata #2461

Job	Run time
Code format	55s
Unit test with cloud	3m 54s
Unit test with docker service [JDK8]	14m 1s
Unit test with in-memory test service [Edge]	11m 24s
Javadoc	3m 10s
Build native test server / Build native test server (ubuntu-24.04-arm, linux, arm64)	6m 17s
Build native test server / Build native test server (ubuntu-latest, linux, amd64, true)	6m 29s
Build native test server / Build native test server (macos-latest, macOS, arm64)	6m 23s
Build native test server / Build native test server (ubuntu-latest, linux, amd64, false)	6m 41s
Build native test server / Build native test server (macos-15-intel, macOS, amd64)	5m 36s
Build native test server / Build native test server (windows-latest, windows, amd64)	6m 14s
	1h 11m 4s

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