[release] Prepare release core-1.15.2 (#7046)

Co-authored-by: opentelemetrybot <107717825+opentelemetrybot@users.noreply.github.com>
Co-authored-by: Martin Costello <martin@martincostello.com>
Co-authored-by: Piotr Kiełkowicz <pkiekowicz@splunk.com>
Co-authored-by: Rajkumar Rangaraj <rajrang@microsoft.com>

Author: 5 people

RELEASENOTES.md

@@ -4,6 +4,17 @@ This file contains highlights and announcements covering all components.
 For more details see `CHANGELOG.md` files maintained in the root source
 directory of each individual package.
 
+## 1.15.2
+
+Release details: [1.15.2](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.15.2)
+
+* Limit how much of the response body is read by the OTLP exporter when
+  export fails and error logging is enabled.
+* Added Task-based worker support for `BatchExportProcessor` and
+  `PeriodicExportingMetricReader` to enable the OpenTelemetry SDK to work
+  in single-threaded WebAssembly environments such as Blazor and
+  Uno Platform.
+
 ## 1.15.1
 
 Release details: [1.15.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.15.1)

src/OpenTelemetry.Api.ProviderBuilderExtensions/CHANGELOG.md

@@ -7,6 +7,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.15.2
+
+Released 2026-Apr-08
+
 ## 1.15.1
 
 Released 2026-Mar-27

src/OpenTelemetry.Api/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.15.2
+
+Released 2026-Apr-08
+
 ## 1.15.1
 
 Released 2026-Mar-27

src/OpenTelemetry.Exporter.Console/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.15.2
+
+Released 2026-Apr-08
+
 ## 1.15.1
 
 Released 2026-Mar-27

src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.15.2
+
+Released 2026-Apr-08
+
 ## 1.15.1
 
 Released 2026-Mar-27

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md

@@ -7,6 +7,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.15.2
+
+Released 2026-Apr-08
+
 * Limit how much of the response body is read when export fails and
   error logging is enabled.
   ([#7017](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7017))

src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.15.2
+
+Released 2026-Apr-08
+
 ## 1.15.1
 
 Released 2026-Mar-27

src/OpenTelemetry.Extensions.Hosting/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.15.2
+
+Released 2026-Apr-08
+
 ## 1.15.1
 
 Released 2026-Mar-27

src/OpenTelemetry.Extensions.Propagators/CHANGELOG.md

@@ -6,6 +6,10 @@ covering all components see: [Release Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.15.2
+
+Released 2026-Apr-08
+
 ## 1.15.1
 
 Released 2026-Mar-27

src/OpenTelemetry/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.15.2
+
+Released 2026-Apr-08
+
 * Added Task-based worker support for `BatchExportProcessor` and
   `PeriodicExportingMetricReader` to enable OpenTelemetry to work in
   single-threaded WebAssembly environments such as Blazor and Uno Platform.