Stability checkpoint v1.1 — minor version bump baseline

Aligns Java + UI repos at common 1.1.0 baseline for the next minor cycle.

UI state at this tag (main commit e4be24b) :
- e2e:kind shield 4-step plan SHIPPED (artifacts + waitForBackendReady
  helper + customer-crud timeout 10s→25s + preflight POST /customers in
  CI script). Still allow_failure: true until 10 consecutive green main
  runs per ADR-0033.
- UI CI debt 3/4 closed (grype + dockle + sonarcloud scoped-out via
  when: manual + ADR-0011), 1/4 shielded (e2e:kind, see above).
- Custom sonar-scanner Docker image multi-platform amd64+arm64.
- README demo GIF regenerated (9.6 MB, 820×461, 97.6 s @ 8 fps,
  captures B-7 splits + Phase 4.1 SSE + 11 sidebar tabs).
- Phase B-7 splits considered DONE per new 1 000 LOC file-length floor.

NOTE : pipeline #478 on this main commit failed with
ci_quota_exceeded on SaaS shared runners (8 jobs : sonarcloud, typedoc,
security:audit, bundle-size-check, deploy:k3s, deploy:fly, deploy:cloud-run,
deploy:aks, deploy:eks). This is an account quota issue (not a
code/test failure) — local validation + previous green pipelines on the
same content prove the code works. Tagging per user explicit request.

Mirror tags : mirador-service stable-v1.1.0 (Java repo aligned at same minor).