Fix accumulation of time duration in subsequent events

[gauravharsha]

In the current default behavior of timing module, repeated calls of start and stop for same event accumulates the duration of the event. While, in general, this is good within a SCF iteration, transfer of the accumulated duration across multiple iterations is problematic.

This PR fixes this issue by adding a boolean keyword accumulate in the declaration of event.
Tests are also added for the new functionality.

[Copilot]

Pull Request Overview

This PR adds two new features to the timing utility: (1) an accumulate mode that controls whether event durations are accumulated across multiple start/end cycles or replaced, and (2) a reset() method to clear child event durations.

Key changes:

• Added accumulate parameter to start() method with default value false
• Added reset() method to zero out child event durations
• Added comprehensive tests for both features

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
src/green/utils/timing.h	Added accumulate field to event_t struct, modified start() to accept accumulate parameter, updated end() to conditionally accumulate or replace duration, added reset() method with documentation
test/utils_test.cpp	Added "Test Accumulate" section testing both accumulate=true and accumulate=false modes, added "Test Reset" section verifying child events are zeroed

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[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

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[egull]

Looks good to me. Let's merge.