* fix(obs): prevent rolling log stdout aliasing
* fix(ecstore): bound hot-path tracing payloads
* test(logging): guard service and disk log invariants
* fix(obs): silence useless_conversion on st_dev for Linux clippy
rustix's Stat.st_dev is u64 on Linux/glibc, making u64::try_from a no-op
that trips clippy::useless_conversion under -D warnings. The conversion is
still needed on macOS/BSD where st_dev is a signed dev_t, so suppress the
lint on that line rather than dropping the portable fallible conversion.
* fix(logging): keep stdout sink validation portable (#4769)
* fix(obs): keep stdout device conversion portable
* docs(logging): update single-writer plan status
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Co-authored-by: overtrue <anzhengchao@gmail.com>
Co-authored-by: houseme <housemecn@gmail.com>