Operational baseline for the live EVO-51 pipeline

Maintenance home for the already-live web-usage telemetry pipeline: ingest service (/opt/telemetry-ingest/server.mjs + telemetry-ingest.service), nightly rollup+purge (rollup.sh + telemetry-webusage-rollup.timer), webusage schema tables (usageEvents append-only + usageDaily rollup), per-app bearer token registry (.env), repo github.com/ElazarPimentel/telemetry-ingest. Registry row 28. Ongoing ops/maintenance land here so the pipeline stops being untracked (it had no WI because 'EVO-51' collides with EVO-51 nav-link normalization).