OpenTelemetryInterceptorFactory

OpenTelemetry interceptor factory for Java handlers. Implements both and RunInterceptor.Factory so a single registration covers both invocation- and run-level spans.

• Per invocation: opens an attempt <target> span (server kind) with restate.invocation.id and restate.invocation.target attributes. The parent span context is extracted from the incoming request headers via the configured .
• Per ctx.run(name, ...) call: opens a run (<name>) child span with the restate.run.name attribute.

Scopes are thread-local. Use with OpenTelemetryRunContextPropagator (registered via SPI by default) to propagate spans to run closures.