fix: prevent startup panics on databases missing base tables

The catch-up migration now creates the servers table if missing, like
sign_sessions. Startup cleanup queries in main.go use Exec instead of
MustExec so missing tables log warnings rather than panicking.

main.go

@@ -240,11 +240,17 @@ func main() {
 	if len(ownedServerIDs) > 0 {
 		idList := strings.Join(ownedServerIDs, ",")
 		if config.DebugOptions.ProxyPort == 0 {
-			_ = db.MustExec("DELETE FROM sign_sessions WHERE server_id IN (" + idList + ")")
+			if _, err := db.Exec("DELETE FROM sign_sessions WHERE server_id IN (" + idList + ")"); err != nil {
+				logger.Warn("Failed to clear stale sign sessions", zap.Error(err))
+			}
+		}
+		if _, err := db.Exec("DELETE FROM servers WHERE server_id IN (" + idList + ")"); err != nil {
+			logger.Warn("Failed to clear stale server entries", zap.Error(err))
 		}
-		_ = db.MustExec("DELETE FROM servers WHERE server_id IN (" + idList + ")")
 	}
-	_ = db.MustExec(`UPDATE guild_characters SET treasure_hunt=NULL`)
+	if _, err := db.Exec(`UPDATE guild_characters SET treasure_hunt=NULL`); err != nil {
+		logger.Warn("Failed to reset treasure hunts", zap.Error(err))
+	}
 
 	// Clean the DB if the option is on.
 	if config.DebugOptions.CleanDB {

server/migrations/sql/0002_catch_up_patches.sql

@@ -14,6 +14,19 @@
 --   20-reset-warehouses — destructive data reset (NULLs all item_box columns)
 
 
+------------------------------------------------------------------------
+-- Ensure tables that predate the patch series exist. These were always
+-- part of the base schema but may be missing from very old databases.
+------------------------------------------------------------------------
+CREATE TABLE IF NOT EXISTS public.servers (
+    server_id integer NOT NULL,
+    current_players integer NOT NULL,
+    world_name text,
+    world_description text,
+    land integer
+);
+
+
 ------------------------------------------------------------------------
 -- Patch 00: psn-id (sign_sessions primary key + psn columns)
 ------------------------------------------------------------------------