Mint a first-party localStorage anonId, thread it onto play/share beacons, persist it via EventController, and add all-time distinct-listener counts (site/track/release). Storage columns + indexes already existed from 16.1.
Player-service play-session tracker (floor + 3-bucket classify), SharePopover share tracker with debounce, sendBeacon interop, proxied rate-limited POST api/event/{play,share}, append-only event logs + incremental play_counter with server-side release resolution. Migration authored, not applied. No anonId, no read surface.
daniel-c-harvey