Adds GetLatestSample function

[saksham-chawla]

Adds GetLatestSample function

This pull request introduces a new GetLatestSample() function to the SkeletonEventBinding interface and its lola::SkeletonEvent implementation. This function allows consumers to retrieve the most recently sent sample from an event. It also adds a new GetLatestSlot() function to EventDataControlCompositeImpl to find the latest readable slot, which is then utilized by GetLatestSample(). Extensive unit tests have been added to validate this new functionality across various scenarios.

Architecture Diagram:

flowchart TD
    subgraph API_Layer
        A["SkeletonEvent (+10 lines)"] --"delegates GetLatestSample"--> B["SkeletonEventBinding (+2 lines)"]
    end

    subgraph Service_Layer
        B["SkeletonEventBinding (+2 lines)"] --"implemented by"--> C["lola::SkeletonEvent (+38 lines)"]
        C --"calls GetLatestSlot"--> D["EventDataControlComposite (+2 lines)"]
        C --"accesses data"--> E[("EventDataStorage")]
    end

    subgraph Control_Layer
        D["EventDataControlComposite (+2 lines)"] --"manages"--> F["EventDataControl"]
        D --"uses"--> G["EventSlotStatus"]
        D --"finds latest slot"--> H["FindLatestReadableSlotIndex (+19 lines)"]
        D --"increments ref count"--> I["TryIncreaseReferenceCount (+13 lines)"]
    end

    subgraph Test_Layer
        J["lola::SkeletonEvent_test (+50 lines)"] --"tests"--> C
        K["EventDataControlComposite_test (+68 lines)"] --"tests"--> D
        L["SkeletonEvent_test (+54 lines)"] --"tests"--> A
        M["SkeletonEventBinding_test (+4 lines)"] --"tests"--> B
    end

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