log service worker messages to the DB (now works)

src/db/tables/logs.ts

@@ -3,5 +3,8 @@ export interface Log {
 }
 
 export const LogSchema = {
-  logs: "message",
+  // Currently keyed by "date" because A) today's log data is what we need so we append, and
+  // B) we don't want it to grow so we remove everything if this is the first entry today.
+  // See safari-notifications.js logMessage for the associated logic.
+  logs: "date, message",
 };