temporal-spring-ai: README expansion and default-model-name consolidation #2497

Job	Run time
Unit test with in-memory test service [Edge]	6m 26s
Unit test with cloud	4m 54s
Javadoc	3m 23s
Code format	56s
Unit test with docker service [JDK8]	13m 49s
Build native test server / Build native test server (ubuntu-24.04-arm, linux, arm64)	6m 43s
Build native test server / Build native test server (ubuntu-latest, linux, amd64, false)	7m 5s
Build native test server / Build native test server (windows-latest, windows, amd64)	7m 19s
Build native test server / Build native test server (macos-15-intel, macOS, amd64)	7m 53s
Build native test server / Build native test server (ubuntu-latest, linux, amd64, true)	6m 15s
Build native test server / Build native test server (macos-latest, macOS, arm64)	6m 8s
	1h 10m 51s

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