fix(node-sdk): add OTLP integration path for OTel-first Node.js projects

[Copilot]

getsentry/sentry-javascript#19729 added otlpIntegration at @sentry/node-core/light/otlp for users who already manage their own OpenTelemetry setup. The sentry-node-sdk skill had no OTLP path, unlike the Python and Ruby skills which both document this pattern.

sentry-node-sdk/SKILL.md

• Phase 1: Detect @opentelemetry/sdk-node, @opentelemetry/sdk-trace-node, NodeTracerProvider in package.json/source
• Phase 2: Route OTel-detected projects to OTLP path; mark Tracing and Profiling as "skip if OTel detected" (profiling requires tracesSampleRate, incompatible with OTLP)
• Phase 3: New "OTLP Integration" section with install, init, collector endpoint, and a comparison table vs standard @sentry/node
• Config Reference: otlpIntegration() options table (setupOtlpTracesExporter, collectorUrl)
• Troubleshooting: 3 OTLP-specific entries

import { NodeTracerProvider } from '@opentelemetry/sdk-trace-node';
import * as Sentry from '@sentry/node-core/light';
import { otlpIntegration } from '@sentry/node-core/light/otlp';

const provider = new NodeTracerProvider();
provider.register();

Sentry.init({
  dsn: process.env.SENTRY_DSN,
  // Do NOT set tracesSampleRate — OTel controls sampling
  integrations: [otlpIntegration()],
});

sentry-otel-exporter-setup/SKILL.md

• Step 8 now includes Node.js alongside Python and Ruby with full setup instructions