Improvements to Java Declarative Config

[zeitlinger]

Section https://opentelemetry.io/docs/zero-code/java/agent/declarative-configuration/#getting-started

From open-telemetry/opentelemetry-java-instrumentation#15217 (comment)

where is that configuration file I'm supposed to save?

it should have been the snippet from https://opentelemetry.io/blog/2025/declarative-config/#getting-started

That one could work if you don't need context propagation

will add that

Section https://opentelemetry.io/docs/zero-code/java/agent/declarative-configuration/#not-yet-supported-features

From open-telemetry/opentelemetry-java-instrumentation#15217 (comment)

existing extensions won't work

will add that

[zeitlinger]

@laurit thanks for the feedback - please double check if that is all you found