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@EventListener fires on every license install/replace/expire. For each environment, computes effective TTL = min(licenseCap, env.configured) and emits one ALTER TABLE ... MODIFY TTL ... per (table, env). Tables covered: executions, processor_executions, logs, agent_metrics, agent_events. ClickHouse failures are logged but do not propagate (listener is async-tolerant). route_diagrams is intentionally excluded -- it has no TTL clause in init.sql (ReplacingMergeTree keyed on content_hash, not time-series). server_metrics is also excluded -- it has no environment column (server straddles environments). Per-environment TTL via WHERE requires ClickHouse 22.3+; the project's current image (clickhouse/clickhouse-server:24.12) is well above that floor. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>