feat v1.36.2: per-source glow radius

- marker.glow_radius_cm overrides the global default per device (field
  in the marker dialog, HA units, placeholder = global default); pools
  and door sectors use the per-source radius
- backend schema; smoke_glow extended (11 checks); docs same-commit

src/types.ts

@@ -46,6 +46,8 @@ export interface Marker {
   angle?: number | null;       // icon rotation, degrees
   /** Entities this icon toggles as a group (wall switch → its lights). */
   controls?: string[] | null;
+  /** Per-source glow radius in cm (glow fill); null = the global default. */
+  glow_radius_cm?: number | null;
 }
 
 /** A door or window: plan geometry (normalized coords), optionally live via entities. */