fix: Sanitize value in metrics

CHANGELOG.md

@@ -14,6 +14,7 @@ If you have conflicts, you can opt-out by adding the following to your `csproj`:
 
 ### Fixes
 
+- Fixed an issue with tag values in metrics not being properly serialized ([#3065](https://github.com/getsentry/sentry-dotnet/pull/3065))
 - Moved the binding to MAUI events for breadcrumb creation from `WillFinishLaunching` to `FinishedLaunching`. This delays the initial instantiation of `app`. ([#3057](https://github.com/getsentry/sentry-dotnet/pull/3057))
 - The SDK no longer adds the `WinUIUnhandledExceptionIntegration` on non Windows platforms ([#3055](https://github.com/getsentry/sentry-dotnet/pull/3055))
 

src/Sentry/Protocol/Metrics/Metric.cs

@@ -97,7 +97,7 @@ public async Task SerializeAsync(Stream stream, IDiagnosticLogger? logger, Cance
                 {
                     await Write(",");
                 }
-                await Write($"{key}:SanitizeValue(value)");
+                await Write($"{key}:{MetricHelper.SanitizeValue(value)}");
             }
         }
 

test/Sentry.Tests/MetricTests.SerializeAsync_WritesMetric_metric=CounterMetric.verified.txt

@@ -1 +1 @@
-my.counter@counters:5|c|#tag1:SanitizeValue(value),tag2:SanitizeValue(value)|T1577836800
+my.counter@counters:5|c|#tag1:value1,tag2:value2|T1577836800

test/Sentry.Tests/MetricTests.SerializeAsync_WritesMetric_metric=DistributionMetric.verified.txt

@@ -1 +1 @@
-my.distribution@distributions:5:7:13|d|#tag1:SanitizeValue(value),tag2:SanitizeValue(value)|T1577836800
+my.distribution@distributions:5:7:13|d|#tag1:value1,tag2:value2|T1577836800

test/Sentry.Tests/MetricTests.SerializeAsync_WritesMetric_metric=GaugeMetric.verified.txt

@@ -1 +1 @@
-my.gauge@gauges:7:5:7:12:2|g|#tag1:SanitizeValue(value),tag2:SanitizeValue(value)|T1577836800
+my.gauge@gauges:7:5:7:12:2|g|#tag1:value1,tag2:value2|T1577836800

test/Sentry.Tests/MetricTests.SerializeAsync_WritesMetric_metric=SetMetric.verified.txt

@@ -1 +1 @@
-my.set@sets:5:7|s|#tag1:SanitizeValue(value),tag2:SanitizeValue(value)|T1577836800
+my.set@sets:5:7|s|#tag1:value1,tag2:value2|T1577836800