(ping) Fix wait logic to use synchronized block

code/processes/ping-process/java/nu/marginalia/ping/PingMain.java

@@ -93,7 +93,10 @@ public class PingMain extends ProcessMainClass {
 
         try {
             main.runPrimary();
-            for(;;) main.wait(); // Wait on the object lock to avoid busy-looping
+            for(;;)
+                synchronized (main) { // Wait on the object lock to avoid busy-looping
+                    main.wait();
+                }
         }
         catch (Throwable ex) {
             logger.error("Error running ping process", ex);

code/processes/ping-process/java/nu/marginalia/ping/model/DomainAvailabilityRecord.java

@@ -154,7 +154,7 @@ implements WritableModel
                 ps.setNull(12, java.sql.Types.SMALLINT);
             }
             else {
-                ps.setShort(12, (short) httpResponseTime().toMillis());
+                ps.setInt(12, Math.clamp(httpResponseTime().toMillis(), 0, 0xFFFF)); // "unsigned short" in SQL
             }
 
             if (errorClassification() == null) {