Run daily job in transaction

app/src/main/java/eu/faircode/email/JobDaily.java

@@ -61,6 +61,9 @@ public class JobDaily extends JobService {
         executor.submit(new Runnable() {
             @Override
             public void run() {
+                try {
+                    db.beginTransaction();
+
                     Log.i(Helper.TAG, "Start daily job");
 
                     // Cleanup message files
@@ -96,8 +99,14 @@ public class JobDaily extends JobService {
                     int logs = db.log().deleteLogs(before);
                     Log.i(Helper.TAG, "Deleted logs=" + logs);
 
+                    db.setTransactionSuccessful();
+                } catch (Throwable ex) {
+                    Log.e(Helper.TAG, ex + "\n" + Log.getStackTraceString(ex));
+                } finally {
+                    db.endTransaction();
                     Log.i(Helper.TAG, "End daily job");
                 }
+            }
         });
 
         return false;