handletelegram: fix disabling disappearing timer

pkg/connector/store/upgrades/00-latest.sql

@@ -1,4 +1,4 @@
--- v0 -> v3 (compatible with v2+): Latest revision
+-- v0 -> v4 (compatible with v2+): Latest revision
 
 CREATE TABLE telegram_user_state (
     user_id BIGINT NOT NULL PRIMARY KEY,

pkg/connector/store/upgrades/04-fix-invalid-disappearing-timers.sql

@@ -0,0 +1,4 @@
+-- v4 (compatible with v2+): Clear invalid disappearing timers in portal table
+UPDATE portal
+SET disappear_type=NULL, disappear_timer=NULL
+WHERE disappear_timer=0 OR disappear_timer IS NULL OR disappear_type IS NULL;