[codex] Finalize elapsed Intrade live bars

[LimiNode]

Summary

• finalize initialized Intrade live bars from the platform process cycle when their timeframe bucket has elapsed
• preserve source price and volume precision for timer-finalized batches
• ignore late ticks for finalized buckets while allowing later buckets to open normally
• document the process-driven finalization contract

Tests

• intrade_bar_api_response_test.exe --gtest_filter=IntradeBarApiResponses.IntradeBarBarSubscription* --gtest_brief=1 (5 passed)
• intrade_bar_api_response_test.exe --gtest_brief=1 (83 passed)
• header_only_odr_test.exe --gtest_brief=1 (4 passed)
• market_data_subscription_contract_test.exe --gtest_brief=1 (21 passed)

Follow-up

• Decouple event-time bar bucketing from local receipt/deadline timing so timer finalization remains stable under broker/local clock skew while preserving tick-driven next-bucket finalization.