feat(llmrails): isolate LLMs only for configured actions

[Pouyanpi]

Update isolated LLM creation to only target actions defined in rails config flows. This ensures that LLMs are not unnecessarily created for actions not present in the configuration. Adds comprehensive tests to verify correct behavior, including handling of empty configs and skipping already-registered LLMs.

[Copilot]

Pull Request Overview

Updates the isolated LLM creation logic to only create LLMs for actions that are explicitly configured in the rails configuration flows. This optimization prevents unnecessary LLM creation for actions not present in the configuration and adds comprehensive test coverage for various configuration scenarios.

Key changes:

• Modified _create_isolated_llms_for_actions() to only process actions from configured rails flows
• Added logic to extract action names from input and output flows using get_action_details_from_flow_id
• Added comprehensive test coverage for edge cases including empty configs and non-LLM-requiring actions

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
nemoguardrails/rails/llm/llmrails.py	Updated _create_isolated_llms_for_actions() to filter actions based on rails configuration flows
tests/test_llm_isolation.py	Enhanced unit tests with flow configuration mocking and edge case coverage
tests/test_llm_isolation_e2e.py	Added end-to-end test class for comprehensive scenario validation

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