v0.12.0 migrate sqlite3 to psql18, updated auth, deploy docs, account and replay updates

cmd/chess-server/pid.go

@@ -102,4 +102,4 @@ func checkStalePID(path string) error {
 
 	// Process is running
 	return fmt.Errorf("stale PID file: process %d is running but not holding lock", pid)
-}
+}