Set OTel exporter dependencies to api scope in build scripts (#1382)

Update the dependency for open telemetry library

- Change OpenTelemetry exporter dependencies from implementation to api. The Weave and Langfuse integrations expose OtlpHttpSpanExporter in their public API, so the exporter dependencies must be available to consumers.

Author: sdubov

agents/agents-features/agents-features-opentelemetry/build.gradle.kts

@@ -25,8 +25,8 @@ kotlin {
             dependencies {
                 api(project.dependencies.platform(libs.opentelemetry.bom))
                 api(libs.opentelemetry.sdk)
-                implementation(libs.opentelemetry.exporter.otlp)
-                implementation(libs.opentelemetry.exporter.logging)
+                api(libs.opentelemetry.exporter.otlp)
+                api(libs.opentelemetry.exporter.logging)
             }
 
             resources.srcDir(layout.buildDirectory.dir("generated/resources"))

docs/build.gradle.kts

@@ -23,8 +23,8 @@ dependencies {
     implementation(project(":agents:agents-features:agents-features-acp"))
     implementation(project(":agents:agents-test"))
     implementation(project(":koog-agents"))
-    implementation(libs.opentelemetry.exporter.logging)
-    implementation(libs.opentelemetry.exporter.otlp)
+    api(libs.opentelemetry.exporter.logging)
+    api(libs.opentelemetry.exporter.otlp)
 }
 
 dokka {