Add notificationdb table and db wrapper

migrations/schema.sql

@@ -212,5 +212,16 @@ CREATE TABLE IF NOT EXISTS tasks(
     ts TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
     PRIMARY KEY (id));
 
-    CHARACTER SET utf8 COLLATE utf8_bin;
+CREATE TABLE IF NOT EXISTS notifications(
+    id int NOT NULL AUTO_INCREMENT,
+    userId VARCHAR(128) NOT NULL,
+    title VARCHAR(512) NOT NULL,
+    message TEXT,
+    action VARCHAR(512) NOT NULL,
+    acknowledged BOOLEAN DEFAULT false,
+    creationTime TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
 
+    PRIMARY KEY (id)
+);
+
+CHARACTER SET utf8 COLLATE utf8_bin;