feat: add sub worflows run on FuncDSL #1295

[matheusandre1]

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What this PR does / why we need it: Closes: #1295

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[Copilot]

Pull request overview

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Adds support for running nested/sub workflows (“run workflow” tasks) from the Func fluent DSL, closing #1295.

Changes:

• Extend Func FuncDo fluent interfaces/builders to include WorkflowFluent so workflow tasks can be added from Func DSL chains
• Add FuncDSL.workflow(WorkflowConfigurer) helper to append workflow subflow tasks
• Add a JUnit test validating the generated RunWorkflow structure and await(false) propagation

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
experimental/fluent/func/src/test/java/io/serverlessworkflow/fluent/func/FuncDSLTest.java	Adds a test covering building a workflow task via Func DSL and verifying the produced RunWorkflow fields.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/spi/FuncDoFluent.java	Extends Func DSL fluent surface to include workflow tasks (WorkflowFluent).
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/FuncDSL.java	Introduces FuncDSL.workflow(WorkflowConfigurer) task configurer entrypoint.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/FuncTaskItemListBuilder.java	Implements workflow task addition for Func task lists by delegating to spec TaskItemListBuilder.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/FuncDoTaskBuilder.java	Wires workflow(...) into the Func do task builder.

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[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

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[fjtirado]

I think this needs some reworking

[fjtirado]

@matheusandre1 I fixed a problem with the subflow input, which is optiona and was throwing a null pointer
see #1316

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

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[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Comments suppressed due to low confidence (1)

experimental/fluent/func/src/test/java/io/serverlessworkflow/fluent/func/FuncDSLTest.java:35

• There are unused static imports (subflow, workflow) and an unused assertion import (assertFalse) in this test. In Java, unused imports fail compilation, so this needs to be removed or the file should add assertions/tests that actually use them (e.g., a test that exercises the new subflow/workflow APIs).

import static io.serverlessworkflow.fluent.func.dsl.FuncDSL.switchWhenOrElse;
import static io.serverlessworkflow.fluent.func.dsl.FuncDSL.toOne;
import static io.serverlessworkflow.fluent.spec.dsl.DSL.use;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertInstanceOf;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;

import io.serverlessworkflow.api.types.CallHTTP;
import io.serverlessworkflow.api.types.Export;

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