Port node-integration-tests to span streaming

从 dev-packages/node-integration-tests 开始，并将各 suite 与 tracing/httpIntegration-streamed 进行比较。定位 static 和 STREAMED 的 traceLifecycle pin，然后检查受影响 suite 中的 transaction-envelope 断言和 child-span 收集。完成标准是：该 package 全程使用 span streaming，重新合并 streamed 对应项，断言覆盖 span v2，并保留 tracing/sampling-static 以及 public-api/beforeSendSpan-static 作为 static 覆盖。

Port dev-packages/node-integration-tests to span streaming. Span streaming is the default, so every suite that still pins traceLifecycle: 'static' covers behaviour we no longer ship.

Part of SDK-1425, one tracking issue per integration test package.

Scope

• 299 traceLifecycle: 'static' pins across 188 suite directories
• 111 suite directories assert on transaction envelopes and need a real rewrite
• 19 suites already have a -streamed twin next to the static original
• 20 suites use the env-gated traceLifecycle: process.env.STREAMED === 'true' ? 'stream' : 'static' pattern

How to port a suite

1. Remove the traceLifecycle: 'static' pin from every Sentry.init in the suite.
2. If a -streamed twin exists, fold it back: delete the static original and rename the twin to the base name. Do not keep both, or the coverage doubles and the two copies drift.
3. If the suite uses the env-gated STREAMED switch, drop the switch and keep 'stream'.
4. Rewrite the assertions from transaction envelopes to span v2:
   • .expect({ transaction }) becomes .expect({ span }), which gives a SerializedStreamedSpanContainer
   • event.transaction becomes span.name
   • contexts.trace.op becomes the sentry.op attribute plus span.is_segment
   • contexts.trace.data['x'] becomes span.attributes['x'], which has the shape { value, type }
   • transaction_info.source becomes the sentry.segment.name.source attribute
5. Streamed child spans arrive across several envelopes, so collect across envelopes wherever a test asserts on children of a segment span.

Watch for span names that become low cardinality under streaming: http.server, http.client, db, cache, gen_ai and graphql. Those assertions change, not just the helper.

Reference suite: suites/tracing/httpIntegration-streamed.

Keep static trace lifecycle coverage

Do not add a -static copy per suite. tracing/sampling-static and public-api/beforeSendSpan-static already guard the static lifecycle for this package.