[nik13]

Summary

Replace the obsolete Java warning and snapshot installation with the official SDK native OpenTelemetry route, using released Maven dependencies.

• Configure one provider and the standard OTLP exporter, with explicit metadata-only defaults and complete Future AGI endpoint/header settings.
• Explain async calls, stream closure, content opt-in, and cache-inclusive token usage.
• Preserve the existing documentation URL and a migration section for com.futureagi:traceai-java-anthropic:1.0.0 consumers.
• Keep wrapper users on one tracing owner by disabling native tracing on wrapped clients; remove the stale Optional-temperature crash warning.
• Align the integration catalog and add regression checks for the setup contract.

Runnable example and SDK compatibility coverage: future-agi/traceAI#489

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