test: add unit test for subscription_handle

[Giannis-dot]

…est running instructions

Description:
This PR adds a missing unit test for the subscription_handle method.
Ensures correct behavior when handling subscription IDs and validates expected output.

Related issue(s):

Fixes #

Notes for reviewer:

4 tests passed in 0.13s

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[tech0priyanshu]

hi @Giannis-dot Thanks for time and effort. some change needs to address

[exploreriii]

Hi @Giannis-dot
Our tests will use pytest automatically when we trigger the existing workflows - I don't think there is a need to add your own workflow to test a particular file
All of them, even new ones added, should be added to the pytest test
Will you need ci.yml?

[exploreriii]

Also please don't forget to add a changelog entry :)

Changing this to draft while you apply changes

[Giannis-dot]

@exploreriii i think i completed the changes, please check my new commits
Thanks

[Giannis-dot]

i made a branch mistake before. now the last commit-push is ready for review

[Copilot]

Pull request overview

This PR adds comprehensive unit tests for the SubscriptionHandle class, testing its cancellation state management, thread lifecycle, and join operations. The PR also includes necessary test infrastructure improvements, including test shims for protobuf modules and a minimal mypy configuration file, along with documentation updates for local test execution.

• Adds 4 unit tests covering the core functionality of SubscriptionHandle
• Introduces test shims for protobuf/gRPC modules to enable isolated unit testing
• Updates documentation with instructions for running tests locally

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/unit/test_subscription_handle.py	Adds unit tests for SubscriptionHandle covering default state, cancellation, thread management, and join operations
tools/_mypy_minimal.ini	Adds minimal mypy configuration for ignoring missing imports during testing
tests/_shims/hiero_sdk_python/hapi/services/timestamp_pb2.py	Provides minimal shim for Timestamp protobuf class used in tests
tests/_shims/hiero_sdk_python/hapi/services/basic_types_pb2.py	Provides minimal shim for basic protobuf types including TransactionID
tests/_shims/hiero_sdk_python/hapi/services/__init__.py	Package initialization for services shims
tests/_shims/hiero_sdk_python/hapi/mirror/consensus_service_pb2_grpc.py	Provides stub for gRPC consensus service used in tests
tests/_shims/hiero_sdk_python/hapi/mirror/__init__.py	Package initialization for mirror shims
tests/_shims/hiero_sdk_python/hapi/__init__.py	Package initialization documenting purpose of test shims
CONTRIBUTING.md	Adds section on running tests locally with PowerShell example
CHANGELOG.md	Documents addition of SubscriptionHandle unit tests

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[Giannis-dot]

is everything ok?do i have to do something more?

[Giannis-dot]

@exploreriii hey, can you please review this to check if everything is ok?

stale

[exploreriii]

congratulations @Giannis-dot !

[Giannis-dot]

Thank you my friend, that was actually my first contribution. it was a pleasure