feat(metrics): Expose Objective-C compatible methods for count, distribution, and gauge metrics

Author: philprime

Sources/Swift/Integrations/Metrics/MetricsApi.swift

@@ -10,6 +10,7 @@
     ///          Prefer stable, lowercase, dot-delimited names to aid aggregation and filtering.
     ///   - value: The count value to record. Typically a non-negative integer (e.g., 1 to increment by one).
     ///            Values less than zero may be ignored or clamped by the metrics backend.
+    @objc(count:value:)
     public func count(key: String, value: Int) {
         // noop
     }
@@ -25,6 +26,7 @@
     ///          Prefer stable, lowercase, dot-delimited names to aid aggregation and filtering.
     ///   - value: The value to record in the distribution. This can be any numeric value
     ///            representing the measurement (e.g., milliseconds for response time).
+    @objc(distribution:value:)
     public func distribution(key: String, value: Double) {
        // noop
     }
@@ -40,6 +42,7 @@
     ///          Prefer stable, lowercase, dot-delimited names to aid aggregation and filtering.
     ///   - value: The current gauge value to record. This represents the state at the time of
     ///            recording (e.g., current memory in bytes, current number of items in queue).
+    @objc(gauge:value:)
     public func gauge(key: String, value: Double) {
         // noop
     }