[release] Prepare release core-1.12.0 (#6268)

Co-authored-by: Rajkumar Rangaraj <rajrang@microsoft.com>

RELEASENOTES.md

@@ -4,6 +4,18 @@ 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.
 
+## 1.12.0
+
+Release details: [1.12.0](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.12.0)
+
+* **Breaking Change**: `OpenTelemetry.Exporter.OpenTelemetryProtocol` now
+  defaults to using OTLP/HTTP instead of OTLP/gRPC when targeting .NET Framework
+  and .NET Standard. This change may cause telemetry export to fail unless
+  appropriate adjustments are made. Explicitly setting OTLP/gRPC may result in a
+  `NotSupportedException` unless further configuration is applied. See
+  [#6209](https://github.com/open-telemetry/opentelemetry-dotnet/issues/6209) for
+  full details and mitigation guidance. [#6229](https://github.com/open-telemetry/opentelemetry-dotnet/pull/6229)
+
 ## 1.11.1
 
 Release details: [1.11.1](https://github.com/open-telemetry/opentelemetry-dotnet/releases/tag/core-1.11.1)

src/OpenTelemetry.Api.ProviderBuilderExtensions/CHANGELOG.md

@@ -7,6 +7,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.12.0
+
+Released 2025-Apr-29
+
 ## 1.11.2
 
 Released 2025-Mar-04

src/OpenTelemetry.Api/.publicApi/Stable/PublicAPI.Shipped.txt

@@ -151,7 +151,8 @@ OpenTelemetry.Trace.Tracer.StartRootSpan(string! name, OpenTelemetry.Trace.SpanK
 OpenTelemetry.Trace.Tracer.StartSpan(string! name, OpenTelemetry.Trace.SpanKind kind = OpenTelemetry.Trace.SpanKind.Internal, in OpenTelemetry.Trace.SpanContext parentContext = default(OpenTelemetry.Trace.SpanContext), OpenTelemetry.Trace.SpanAttributes? initialAttributes = null, System.Collections.Generic.IEnumerable<OpenTelemetry.Trace.Link>? links = null, System.DateTimeOffset startTime = default(System.DateTimeOffset)) -> OpenTelemetry.Trace.TelemetrySpan!
 OpenTelemetry.Trace.Tracer.StartSpan(string! name, OpenTelemetry.Trace.SpanKind kind, in OpenTelemetry.Trace.TelemetrySpan? parentSpan, OpenTelemetry.Trace.SpanAttributes? initialAttributes = null, System.Collections.Generic.IEnumerable<OpenTelemetry.Trace.Link>? links = null, System.DateTimeOffset startTime = default(System.DateTimeOffset)) -> OpenTelemetry.Trace.TelemetrySpan!
 OpenTelemetry.Trace.TracerProvider
-OpenTelemetry.Trace.TracerProvider.GetTracer(string! name, string? version = null) -> OpenTelemetry.Trace.Tracer!
+OpenTelemetry.Trace.TracerProvider.GetTracer(string! name, string? version = null, System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<string!, object?>>? tags = null) -> OpenTelemetry.Trace.Tracer!
+OpenTelemetry.Trace.TracerProvider.GetTracer(string! name, string? version) -> OpenTelemetry.Trace.Tracer!
 OpenTelemetry.Trace.TracerProvider.TracerProvider() -> void
 OpenTelemetry.Trace.TracerProviderBuilder
 OpenTelemetry.Trace.TracerProviderBuilder.TracerProviderBuilder() -> void

src/OpenTelemetry.Api/.publicApi/Stable/PublicAPI.Unshipped.txt

@@ -1,4 +0,0 @@
-OpenTelemetry.Trace.TracerProvider.GetTracer(string! name, string? version = null, System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<string!, object?>>? tags = null) -> OpenTelemetry.Trace.Tracer!
-OpenTelemetry.Trace.TracerProvider.GetTracer(string! name, string? version) -> OpenTelemetry.Trace.Tracer!
-*REMOVED*OpenTelemetry.Trace.TracerProvider.GetTracer(string! name, string? version = null) -> OpenTelemetry.Trace.Tracer!
-

src/OpenTelemetry.Api/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.12.0
+
+Released 2025-Apr-29
+
 * Added a new overload for `TracerProvider.GetTracer` which accepts an optional
   `IEnumerable<KeyValuePair<string, object?>>? tags` parameter, allowing
   additional attributes to be associated with the `Tracer`.

src/OpenTelemetry.Exporter.Console/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.12.0
+
+Released 2025-Apr-29
+
 ## 1.11.2
 
 Released 2025-Mar-04

src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.12.0
+
+Released 2025-Apr-29
+
 ## 1.11.2
 
 Released 2025-Mar-04

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md

@@ -7,6 +7,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.12.0
+
+Released 2025-Apr-29
+
 * **Breaking Change**: .NET Framework and .NET Standard builds now default to
   exporting over OTLP/HTTP instead of OTLP/gRPC. **This change could result in a
   failure to export telemetry unless appropriate measures are taken.**

src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.12.0
+
+Released 2025-Apr-29
+
 ## 1.11.2
 
 Released 2025-Mar-04

src/OpenTelemetry.Extensions.Hosting/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.12.0
+
+Released 2025-Apr-29
+
 ## 1.11.2
 
 Released 2025-Mar-04

src/OpenTelemetry.Extensions.Propagators/CHANGELOG.md

@@ -6,6 +6,10 @@ covering all components see: [Release Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.12.0
+
+Released 2025-Apr-29
+
 ## 1.11.2
 
 Released 2025-Mar-04

src/OpenTelemetry/CHANGELOG.md

@@ -6,6 +6,10 @@ Notes](../../RELEASENOTES.md).
 
 ## Unreleased
 
+## 1.12.0
+
+Released 2025-Apr-29
+
 ## 1.11.2
 
 Released 2025-Mar-04