test(api): lock chat/Completions logit_bias honesty over HTTP

[seonghobae]

Summary

• Re-ship tip substrate (server.py, orchestrator.py, cost_ledger.py) plus fixture model-field alignment from bare main.
• Real HTTP outcome tests for logit_bias honesty (empty object no-op; non-empty fail-closed).
• Cumulative tip honesty tests included.

Test plan

• python -m pytest tests -q — 459 passed locally
• tests/test_chat_logit_bias_http_honesty.py (6 cases)
• CI Full unit + Semgrep product gates

Product gates: Full unit + Semgrep only.

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Review details

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Configuration used: Organization UI

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Run ID: f7373232-9853-46ac-a478-af20571bc832

📥 Commits

Reviewing files that changed from the base of the PR and between 6841b71 and fa8a377.

📒 Files selected for processing (40)

• contextual_orchestrator/cost_ledger.py
• contextual_orchestrator/orchestrator.py
• contextual_orchestrator/server.py
• tests/test_analytics_runtime.py
• tests/test_budget_enforcement.py
• tests/test_chat_developer_multimodal_content_http_honesty.py
• tests/test_chat_empty_user_system_content_http_honesty.py
• tests/test_chat_include_orchestration_trace_http_honesty.py
• tests/test_chat_logit_bias_http_honesty.py
• tests/test_chat_modalities_http_honesty.py
• tests/test_chat_openai_metadata_http_honesty.py
• tests/test_chat_orchestration_mode_http_honesty.py
• tests/test_chat_parallel_tool_calls_http_honesty.py
• tests/test_chat_penalties_http_honesty.py
• tests/test_chat_prediction_http_honesty.py
• tests/test_chat_response_format_http_honesty.py
• tests/test_chat_service_tier_http_honesty.py
• tests/test_chat_store_http_honesty.py
• tests/test_chat_stream_options_http_honesty.py
• tests/test_chat_temperature_top_p_http_honesty.py
• tests/test_chat_tool_call_id_http_honesty.py
• tests/test_chat_tool_choice_functions_http_honesty.py
• tests/test_chat_unknown_fields_http_honesty.py
• tests/test_commercial_readiness.py
• tests/test_completions_legacy_knobs_http_honesty.py
• tests/test_completions_max_tokens_http_honesty.py
• tests/test_completions_prompt_shape_http_honesty.py
• tests/test_completions_seed_http_honesty.py
• tests/test_completions_stop_http_honesty.py
• tests/test_completions_stream_options_http_honesty.py
• tests/test_completions_stream_reject_http_honesty.py
• tests/test_cost_review_server.py
• tests/test_openai_passthrough.py
• tests/test_openai_user_field_http_honesty.py
• tests/test_responses_instructions_reasoning_http_honesty.py
• tests/test_responses_metadata_http_honesty.py
• tests/test_sales_readiness.py
• tests/test_security_hardening.py
• tests/test_streaming.py
• tests/test_true_streaming.py

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[seonghobae]

Closing as superseded by canonical cumulative PR #565. Exact head 9cc1460f1eaead36e28097dd6c967d05f3135271 contains the same tests/test_chat_logit_bias_http_honesty.py contract and the broader request-isolation regression pack. No checks, reviews, approvals, or synthetic-merge evidence transfer between heads.