* origin/main: (21 commits)
  docs(agents): note lint/format/typecheck are advisory, not blocking (#2886)
  Retry transient connection timeouts (#3013)
  fix(world-vercel): append caller User-Agent products instead of discarding them (#2998)
  [ci] Enable NestJS e2e-vercel-prod and add to docs as "experimental" (#3011)
  [ci] Benchmark comment: Best column + best/p75/p99 deltas (drop Avg/P10) (#3005)
  docs: fall back to first child page for sidebar folders without an index (#3009)
  [nest] Fix NestJS Vercel build output (#2988)
  Avoid resolving run data for background steps (#2993)
  chore(docs): update @vercel/geistdocs to 1.14.0 (#3002)
  fix(docs): add version-switcher fallback redirects for pages missing in one version (#3003)
  ci: update opencode to 1.18.4 and switch backport AI model to claude-fable-5 (#3006)
  fix(core): batch stream writes via writeMulti (#2995)
  perf(core): cache port discovery in step invocations for self-hosted worlds  (#2996)
  feat(web-shared): Alt+hover span measurement in the new trace viewer (#2985)
  fix(world-postgres): throw EntityConflictError on duplicate run_created (#2983)
  [ci] Run benchmarks in-deployment to avoid proxy overhead (#2967)
  Enable additional perf optimizations when correctness guarantees are met  (#2970)
  perf(core): prepare replay payloads concurrently (#2980)
  Fix dotted tsconfig alias workflow discovery (#2963)
  Adjust helper position on trace viewer (#2968)
  ...