`[2026-09-22]` Beszel and Uptime Kuma are DISJOINT, not redundant

Beszel and Uptime Kuma are DISJOINT, not redundant — Beszel's alerts bind to a system with a threshold; there is no URL column, so it is structurally incapable of "this endpoint should return 200". Homepage is DISPLAY ONLY (38 polls, alerts nobody). The empty seam between them is where homepage sat dead for three days. Settled; do not re-litigate.