add test for action

[codomposer]

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Add Comprehensive Test Coverage for Action Class

Summary

This PR adds comprehensive unit tests for the Action class in the Chainlit backend, improving test coverage for core functionality.

Changes

New Test File

• backend/tests/test_action.py - Complete test suite for the Action class with 20+ test cases

Bug Fixes

• backend/chainlit/langchain/callbacks.py - Fixed RUF059 linting error by prefixing unused parent_id variable with underscore
• backend/tests/data/storage_clients/test_gcs.py - Fixed RUF043 linting error by using raw string and escaping regex metacharacter

Contribution by Gittensor, learn more at https://gittensor.io/