In 253387@main I enabled signposts when tracing tools are enabled and also tried to make signpost persistence enabled by default. However the default wasn't correct since the plist I committed mapped `Signpost-Persisted` to the integer value `1`. It turns out that libtrace expects that `Signpost-Persisted` must be a boolean value, so signpost persistence wasn't actually enabled by default.
<rdar://problem/106452342>
Pull request: https://github.com/WebKit/WebKit/pull/11256
Committed 261488@main (89dc203c7790): <https://commits.webkit.org/261488@main> Reviewed commits have been landed. Closing PR #11256 and removing active labels.