Optimize event handling performance: move GetEventFields outside lock in QueueEvent#3596

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Copilot wants to merge 3 commits intomasterfrom

copilot/fix-opc-ua-server-unresponsiveness

Commits on Mar 6, 2026

Initial plan
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Optimize QueueEvent to reduce lock contention and add event performance load test

Copilot
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romanett
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Address code review: reuse FilterContext and add named constant for publish wait

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romanett
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