[Fix #1408] Do not rely on ServiceLoader instance creation

[fjtirado]

Fix #1408

[Copilot]

Pull request overview

This PR refactors callable task construction to avoid shared mutable state in ServiceLoader-provided CallableTaskBuilder instances, addressing flaky behavior when multiple call tasks use the same builder type.

Changes:

• Replaces the init() + build() builder lifecycle with init() returning a CallableTaskFactory.
• Updates core, HTTP, OpenAPI, gRPC, and experimental Java function builders to capture per-task state in returned factories.
• Materializes callable task builders from ServiceLoader once and improves the unsupported-task error message.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
impl/core/src/main/java/io/serverlessworkflow/impl/executors/CallableTaskFactory.java	Adds factory interface for producing callable tasks.
impl/core/src/main/java/io/serverlessworkflow/impl/executors/CallableTaskBuilder.java	Changes builder SPI to return a factory from init.
impl/core/src/main/java/io/serverlessworkflow/impl/executors/CallTaskExecutor.java	Uses the returned factory to create callable tasks.
impl/core/src/main/java/io/serverlessworkflow/impl/executors/DefaultTaskExecutorFactory.java	Eagerly materializes ServiceLoader builders and updates lookup error text.
impl/core/src/main/java/io/serverlessworkflow/impl/executors/CallFunctionExecutorBuilder.java	Refactors call-function builder state into local factory captures.
impl/http/src/main/java/io/serverlessworkflow/impl/executors/http/CallableTaskHttpExecutorBuilder.java	Refactors HTTP call builder to return a per-task factory.
impl/openapi/src/main/java/io/serverlessworkflow/impl/executors/openapi/OpenAPIExecutorBuilder.java	Refactors OpenAPI call builder to return a per-task factory.
impl/grpc/src/main/java/io/serverlessworkflow/impl/executors/grpc/GrpcExecutorBuilder.java	Refactors gRPC call builder to return a per-task factory.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaConsumerCallExecutorBuilder.java	Refactors Java consumer call builder to return a factory.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaContextFunctionCallExecutorBuilder.java	Refactors Java context function builder to return a factory.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaFilterFunctionCallExecutorBuilder.java	Refactors Java filter function builder to return a factory.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaFunctionCallExecutorBuilder.java	Refactors Java function builder to return a factory.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaLoopFunctionCallExecutorBuilder.java	Refactors Java loop function builder to return a factory.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaLoopFunctionIndexCallExecutorBuilder.java	Refactors Java indexed loop function builder to return a factory.

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[Copilot]

Pull request overview

Copilot reviewed 14 out of 14 changed files in this pull request and generated no new comments.