feat(metrics): add support for classic, time, and native histograms.

foundations-metrics-registry/src/proto/mod.rs

@@ -10,7 +10,7 @@
 mod model;
 
 pub use model::{
-    BucketSpan, Counter, Gauge, Histogram, LabelPair, Metric, MetricFamily, MetricType,
+    Bucket, BucketSpan, Counter, Gauge, Histogram, LabelPair, Metric, MetricFamily, MetricType,
 };
 
 #[cfg(test)]

foundations-metrics/Cargo.toml

@@ -8,7 +8,10 @@ license.workspace = true
 
 [dependencies]
 foundations-metrics-registry = { workspace = true }
-prometheus-client = "0.25.0"
+prometheus-client = { version = "0.25.0", features = [
+    "prometheus_protobuf",
+    "protobuf-protox",
+] }
 serde = { workspace = true, features = ["derive"] }
 ryu = "1.0.23"
 parking_lot = { workspace = true }

foundations-metrics/src/lib.rs

@@ -18,7 +18,8 @@ pub use foundations_metrics_registry::{
 };
 pub use labels::{LabelError, to_label_pairs};
 pub use metrics::{
-    Counter, CounterAtomic, Family, FamilyMetricGuard, Gauge, GaugeAtomic, GaugeGuard,
-    MetricConstructor, RangeGauge,
+    Counter, CounterAtomic, Family, FamilyMetricGuard, Gauge, GaugeAtomic, GaugeGuard, Histogram,
+    HistogramBuilder, HistogramSnapshot, HistogramTimer, MetricConstructor, NativeHistogram,
+    NativeHistogramBuilder, RangeGauge, TimeHistogram,
 };
 pub use registered::NamedMetric;