Backport of command/debug: fix bug where monitor was not honoring configured duration into release/1.9.x

[hc-github-team-secure-vault-core]

Backport

This PR is auto-generated from #16834 to be assessed for backporting due to the inclusion of the label backport/1.9.x.

WARNING automatic cherry-pick of commits failed. Commits will require human attention.

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The below text is copied from the body of the original PR.

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This PR fixes a bug in the log target for vault debug. When defining a debug duration length longer than two minutes, the vault.log file in the debug package would only have the first two minutes of logs emitted during the window, and then have newlines for the remainder of the time frame.

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Overview of commits

• a222dbf

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