Stabilize annotations (#7046)

Resolves #6494

.github/workflows/build-common.yml

@@ -119,7 +119,9 @@ jobs:
 
       - name: Check for jApiCmp diffs
         run: |
-          if git diff --quiet
+          # need to "git add" in case any generated files did not already exist
+          git add docs/apidiffs
+          if git diff --cached --quiet
           then
             echo "No diff detected."
           else

docs/apidiffs/current_vs_latest/opentelemetry-instrumentation-annotations.txt

@@ -0,0 +1,20 @@
+Comparing source compatibility of  against 
++++  NEW ANNOTATION: PUBLIC(+) ABSTRACT(+) io.opentelemetry.instrumentation.annotations.SpanAttribute  (not serializable)
+	+++  CLASS FILE FORMAT VERSION: 52.0 <- n.a.
+	+++  NEW INTERFACE: java.lang.annotation.Annotation
+	+++  NEW SUPERCLASS: java.lang.Object
+	+++  NEW METHOD: PUBLIC(+) ABSTRACT(+) java.lang.String value()
+	+++  NEW ANNOTATION: java.lang.annotation.Target
+		+++  NEW ELEMENT: value=java.lang.annotation.ElementType.PARAMETER (+)
+	+++  NEW ANNOTATION: java.lang.annotation.Retention
+		+++  NEW ELEMENT: value=java.lang.annotation.RetentionPolicy.RUNTIME (+)
++++  NEW ANNOTATION: PUBLIC(+) ABSTRACT(+) io.opentelemetry.instrumentation.annotations.WithSpan  (not serializable)
+	+++  CLASS FILE FORMAT VERSION: 52.0 <- n.a.
+	+++  NEW INTERFACE: java.lang.annotation.Annotation
+	+++  NEW SUPERCLASS: java.lang.Object
+	+++  NEW METHOD: PUBLIC(+) ABSTRACT(+) io.opentelemetry.api.trace.SpanKind kind()
+	+++  NEW METHOD: PUBLIC(+) ABSTRACT(+) java.lang.String value()
+	+++  NEW ANNOTATION: java.lang.annotation.Target
+		+++  NEW ELEMENT: value=java.lang.annotation.ElementType.METHOD,java.lang.annotation.ElementType.CONSTRUCTOR (+)
+	+++  NEW ANNOTATION: java.lang.annotation.Retention
+		+++  NEW ELEMENT: value=java.lang.annotation.RetentionPolicy.RUNTIME (+)

instrumentation-annotations/build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
   id("otel.java-conventions")
+  id("otel.japicmp-conventions")
   id("otel.publish-conventions")
 
   id("otel.animalsniffer-conventions")

instrumentation-annotations/gradle.properties

@@ -0,0 +1 @@
+otel.stable=true