Forward buttons in /orchestrate/test Conversion Block

[nuwangeek]

Priority: P4 — Correctness fix in the API layer
File: src/llm_orchestration_service_api.py
Handler: test_orchestrate_llm_request()
Type: Bug fix (future)
The explicit field copy from OrchestrationResponse to TestOrchestrationResponse must include buttons once that field exists (added in Task-02):

test_response = TestOrchestrationResponse(
    llmServiceActive=response.llmServiceActive,
    questionOutOfLLMScope=response.questionOutOfLLMScope,
    inputGuardFailed=response.inputGuardFailed,
    content=response.content,
    buttons=response.buttons,   # <-- add this
    chunks=None,
)

Work:

1. After Task-02 is complete, add buttons=response.buttons to this copy block.
2. This is a one-line change but must not be forgotten — without it, the test endpoint silently drops button data.