[WIP] Add cron-like job for periodic maintenance of settings db, update TODO.md

internal/tg/periodicJobs.go

@@ -0,0 +1,23 @@
+package tg
+
+import (
+	"aleesa-telegram-go/internal/log"
+)
+
+var (
+	// TidySettingsDB flushes regularly pebble dbs with settings. Remmended action to keeb that db in a good shape.
+	// Meant to be run about hourly or something like that.
+	TidySettingsDB = func() {
+		if len(settingsDB) > 0 {
+			for name, db := range settingsDB {
+				log.Debugf("Flushing %s settings db", name)
+
+				if err := db.Flush(); err != nil {
+					log.Errorf("Unable to Flush() %s db: %s", name, err)
+				}
+			}
+		}
+	}
+)
+
+/* vim: set ft=go noet ai ts=4 sw=4 sts=4: */