backport a bunch of stuff#2255

Merged

hawkw merged 11 commits intov0.1.xfrom

eliza/backport-2225

Jul 29, 2022

Commits on Jul 28, 2022

appender: add `Builder::filename_suffix` parameter (#2225)

IceSentry
authored and
hawkw
committed
subscriber: mark builders as must_use (#2239)

kartva
authored and
hawkw
committed
opentelemetry: support publishing metrics (#2185)

committed
opentelemetry: feature-flag `MetricsLayer` (#2234)
hawkw
committed
subscriber: add `Targets::default_level` method (#2242)

connec
authored and
hawkw
committed
subscriber: impl `LookupSpan` for `Box<LS>` and `Arc<LS>` (#2247)

jswrenn
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hawkw
committed
serde: implement `AsSerde` for `FieldSet` (#2241)

iliakonnov
authored and
hawkw
committed
subscriber: add `Filter::event_enabled` (#2245)

CAD97
authored and
hawkw
committed

Commits on Jul 29, 2022