fix(telemetry,workers): canonical netscript.* correlation/outcome floor on Flow-B product spans

[rickylabs]

Closes #599

Summary

Implements the four #599 acceptance boxes (product gaps found by the T8 Flow-B merge gate, PR #598):

1. traceJobExecution() now emits canonical netscript.outcome at running/completed/failed transitions (legacy job.status retained).
2. Trigger ingress/detect/process spans emit netscript.correlation.id (event id) + netscript.outcome; queue enqueue/dequeue spans emit the pair from the message envelope's correlationId (TC-6/TC-7 floor).
3. processWorkerJob() → executeWorkerJob() → executeDenoJob() thread correlationId into the rebuilt in-process JobMessage, so the callback handler inherits the product span's correlation value.
4. T8 gate tightened, not forked: validate-flow-b-traces.ts correlatedSpans now covers ingress/process/enqueue/dequeue/execute/callback-boundary/fan-in, with the canonical outcome asserted on the full set and single-correlation-id equality across all seven.

No new public API; values added to existing attribute maps only. No deno.lock churn.

Lane + evidence

WSL Codex slice (thread 019f5117-bcd2…, worktree ns-wt-599) under the beta-7 orchestrator (df71d36c); worklog committed at .llm/runs/fix-599-flowb-attribute-floor--codex/worklog.md. Scoped check/lint 335 files 0 findings; telemetry 50/0, workers 24/0 tests. Standalone behavior.otel.traces cannot run without a live prepared runtime (worklog drift D2) — this PR's CI scaffold-runtime job is the live T8 verdict.