v1.1.0 - Operations, observability & CD

Operations, observability, CI/CD and infrastructure hardening. Existing scope: public-link admin console (#7), proactive stale/failing product alerting (#8), richer freshness trend views (#9), app-native /p/* rate limiting (#10), default SMS public links (#11). Audit additions: data-retention/cleanup jobs (F-13), container hardening — non-root/healthcheck/localhost-bind/DSN encoding (F-25), CI on real Postgres with lint/migration/dep-audit gates (F-26), CD rollback + prod deploy path (F-27), Postgres backup strategy (F-28), Postgres integration test tier (F-29). Observability features: Prometheus /metrics (I-03), degraded-data banner (I-04), poller heartbeat/dead-man's-switch (I-07), config export/import (I-09).

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