Retire runtime/API/UI monitored-system volume enforcement now that infrastructure monitoring is no longer capped.
Keep only legacy metadata scrubbing and purchase-start compatibility for old max_monitored_systems references.
Rename the remaining preview surface to monitored-system impact and make previews explanatory rather than save-blocking.
Update subsystem contracts and RA7 evidence for the caps-retired invariant.
Treat OIDC, SAML, and multi-provider SSO as included Community capabilities while retaining advanced_sso as a compatibility key. Remove SAML-specific paywalls and paid-upgrade copy from runtime, settings UI, entitlement snapshots, docs, journey proof, and subsystem contracts.
Refs #1449
rcourtman