feat(graph): add streamhttpnode

[mengnankkkk]

Describe what this PR does / why we need it

from #2423

Does this pull request fix one issue?

Describe how you did it

Describe how to verify it

Special notes for reviews

[VLSMB]

There's no need to add information related to this node in Studio, and there's no corresponding node in Dify either. All you need to do is add an HTTP node that supports streaming operation. Please restore all code modifications for the studio section

[mengnankkkk]

My CI test always shows that it is a CI environment configuration problem. How can I solve it?

[yuluo-yx]

• 🛠️ Build and Test / test (pull_request)

pls check ci log
https://github.com/alibaba/spring-ai-alibaba/actions/runs/17824067433/job/50673270927?pr=2438

Error: -ai-alibaba-graph-core] [ERROR] Tests run: 18, Failures: 10, Errors: 0, Skipped: 0, Time elapsed: 0.387 s <<< FAILURE! -- in com.alibaba.cloud.ai.graph.streaming.StreamHttpNodeTest
Error: -ai-alibaba-graph-core] [ERROR] com.alibaba.cloud.ai.graph.streaming.StreamHttpNodeTest.testUrlValidation_ShouldRejectInternalAddress -- Time elapsed: 0.085 s
Error: -ai-alibaba-graph-core] [ERROR] com.alibaba.cloud.ai.graph.streaming.StreamHttpNodeTest.testUrlValidation_ShouldAllowInternalAddressWhenConfigured -- Time elapsed: 0.051 s
Error: -ai-alibaba-graph-core] [ERROR] com.alibaba.cloud.ai.graph.streaming.StreamHttpNodeTest.testAggregateMode -- Time elapsed: 0.030 s <<< FAILURE!
java.lang.AssertionError: 

Expecting actual:
  {"error"="StreamHttpNode[stream-http] failed: URL validation failed: Internal network access not allowed: localhost. Set allowInternalAddress=true to enable. (URL: http://localhost:47667/aggregate, Status: -1)", "streaming"=false, "timestamp"=1758187524364L}
to contain key:
  "data"
	at com.alibaba.cloud.ai.graph.streaming.StreamHttpNodeTest.lambda$testAggregateMode$9(StreamHttpNodeTest.java:232)
	at reactor.test.DefaultStepVerifierBuilder.lambda$consumeNextWith$1(DefaultStepVerifierBuilder.java:279)
	at reactor.test.DefaultStepVerifierBuilder$SignalEvent.test(DefaultStepVerifierBuilder.java:2289)
	at reactor.test.DefaultStepVerifierBuilder$DefaultVerifySubscriber.onSignal(DefaultStepVerifierBuilder.java:1529)
	at reactor.test.DefaultStepVerifierBuilder$DefaultVerifySubscriber.onExpectation(DefaultStepVerifierBuilder.java:1477)
	at reactor.test.DefaultStepVerifierBuilder$DefaultVerifySubscriber.onNext(DefaultStepVerifierBuilder.java:1146)
	at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2570)
	at reactor.test.DefaultStepVerifierBuilder$DefaultVerifySubscriber.onSubscribe(DefaultStepVerifierBuilder.java:1161)
	at reactor.core.publisher.FluxJust.subscribe(FluxJust.java:68)
	at reactor.core.publisher.Flux.subscribe(Flux.java:8891)
	at reactor.test.DefaultStepVerifierBuilder$DefaultStepVerifier.toVerifierAndSubscribe(DefaultStepVerifierBuilder.java:891)
	at reactor.test.DefaultStepVerifierBuilder$DefaultStepVerifier.verify(DefaultStepVerifierBuilder.java:831)
	at reactor.test.DefaultStepVerifierBuilder$DefaultStepVerifier.verify(DefaultStepVerifierBuilder.java:823)
	at reactor.test.DefaultStepVerifierBuilder.verifyComplete(DefaultStepVerifierBuilder.java:690)
	at com.alibaba.cloud.ai.graph.streaming.StreamHttpNodeTest.testAggregateMode(StreamHttpNodeTest.java:239)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)