Dedicated removal sentinel for removing query knobs

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    • Type: Task
    • Resolution: Fixed
    • Priority: Major - P3
    • 9.0.0-rc0
    • Affects Version/s: None
    • Component/s: None
    • Query Execution
    • Fully Compatible
    • QE 2026-05-11
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      Pure refactoring change. Replaces `std::monostate` with a dedicated `DeleteQueryKnobOverride` struct as the removal sentinel in `QueryKnobValue`. The sentinel marks a knob override for deletion during PQS merge.

            Assignee:
            Catalin Sumanaru
            Reporter:
            Catalin Sumanaru
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              Created:
              Updated:
              Resolved: