Stability checkpoint v1.1 — minor version bump baseline

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

Java state at this tag (main commit 6dca782) :
- SB3 wave 8 KafkaConfig V2 overlay (4 KafkaConfigTest errors closed)
- CORS W3C trace context headers (traceparent / tracestate / baggage)
- Compat matrix officially closed (5/5 cells green : SB4+J25 / SB4+J21 /
  SB4+J17 / SB3+J21 / SB3+J17)
- ADR-0061 catalog closed (Entry 2 + Entry 4 status FIXED)
- OVH budget alert wired (bin/budget/ovh-alert.sh + launchd cron)
- GitLab Observability docs/ops shipped

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