Add network intercept/error monitor; document soak and Outline sync

- interceptNetworkCall + startNetworkErrorMonitor for page traffic
  (spy/mock + fail on silent 4xx/5xx), with unit tests
- docs/NETWORK.md, docs/IDEAS.md (OSS backlog), docs/OUTLINE.md
  (update Outline QA & Dev Playkit page on each release)
- Adoption pause: no other consumer repos until punimtag soak

docs/CONSUMER.md

@@ -55,3 +55,6 @@ e2e:
 
 PR → CI green (unit + e2e when secrets present) → merge → documented deploy script.  
 Do not claim “fixed” from a bare `pct exec` hotfix without a follow-up PR.
+
+**Adoption pause:** do not add playkit to other app repos until punimtag + kit CI
+have soaked for a few days. See `docs/IDEAS.md`.