PR_26175_DELTA_009: Replay event service coverage

[ToolboxAid]

Summary

Team Delta expands replay and runtime event service coverage through the existing page/service runtime lane.

• Adds tests/replay/ReplayTimeline.test.mjs to npm run test:service:runtime.
• Adds tests/events/EventBus.test.mjs to npm run test:service:runtime.
• Reuses scripts/run-node-test-files.mjs.
• Adds no new npm command, no new runner, and no team-specific command.
• Keeps npm test as the site-wide/all-tests command.

Validation

• npm run test:service:runtime PASS, 23/23 targeted Node test files
• Governance guard PASS: no test:delta-runtime, no Delta harness script, npm test unchanged
• git diff --check PASS

Reports

• docs_build/dev/reports/PR_26175_DELTA_009-replay-event-service-coverage.md
• docs_build/dev/reports/codex_review.diff
• docs_build/dev/reports/codex_changed_files.txt
• ZIP: tmp/PR_26175_DELTA_009-replay-event-service-coverage_delta.zip