feat: add Notifications table for push token registration refs #4684

Add Notifications table to fresh-install schema (zm_create.sql.in) and
create idempotent migration (zm_update-1.39.2.sql) for existing installs.
The table stores FCM push notification tokens so zm_detect can send
push notifications directly.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

db/zm_create.sql.in

@@ -1329,6 +1329,24 @@ CREATE TABLE `Events_Tags` (
   CONSTRAINT `Events_Tags_ibfk_2` FOREIGN KEY (`EventId`) REFERENCES `Events` (`Id`) ON DELETE CASCADE
 ) ENGINE=@ZM_MYSQL_ENGINE@;
 
+CREATE TABLE `Notifications` (
+  `Id`              int unsigned    NOT NULL AUTO_INCREMENT,
+  `UserId`          int unsigned    NOT NULL,
+  `Token`           varchar(512)    NOT NULL,
+  `Platform`        enum('android','ios','web') NOT NULL,
+  `MonitorList`     text            DEFAULT NULL,
+  `Interval`        int unsigned    NOT NULL DEFAULT 0,
+  `PushState`       enum('enabled','disabled') NOT NULL DEFAULT 'enabled',
+  `AppVersion`      varchar(32)     DEFAULT NULL,
+  `BadgeCount`      int             NOT NULL DEFAULT 0,
+  `LastNotifiedAt`  datetime        DEFAULT NULL,
+  `CreatedOn`       datetime        DEFAULT NULL,
+  `UpdatedOn`       timestamp       NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (`Id`),
+  UNIQUE KEY `Notifications_Token_idx` (`Token`),
+  KEY `Notifications_UserId_idx` (`UserId`)
+) ENGINE=@ZM_MYSQL_ENGINE@;
+
 source @PKGDATADIR@/db/Object_Types.sql
 -- We generally don't alter triggers, we drop and re-create them, so let's keep them in a separate file that we can just source in update scripts.
 source @PKGDATADIR@/db/triggers.sql

db/zm_update-1.39.2.sql

@@ -0,0 +1,30 @@
+--
+-- Add Notifications table for FCM push token registration
+--
+
+SET @s = (SELECT IF(
+  (SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE table_name = 'Notifications'
+   AND table_schema = DATABASE()) > 0,
+  "SELECT 'Notifications table already exists'",
+  "CREATE TABLE `Notifications` (
+    `Id`              int unsigned    NOT NULL AUTO_INCREMENT,
+    `UserId`          int unsigned    NOT NULL,
+    `Token`           varchar(512)    NOT NULL,
+    `Platform`        enum('android','ios','web') NOT NULL,
+    `MonitorList`     text            DEFAULT NULL,
+    `Interval`        int unsigned    NOT NULL DEFAULT 0,
+    `PushState`       enum('enabled','disabled') NOT NULL DEFAULT 'enabled',
+    `AppVersion`      varchar(32)     DEFAULT NULL,
+    `BadgeCount`      int             NOT NULL DEFAULT 0,
+    `LastNotifiedAt`  datetime        DEFAULT NULL,
+    `CreatedOn`       datetime        DEFAULT NULL,
+    `UpdatedOn`       timestamp       NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    PRIMARY KEY (`Id`),
+    UNIQUE KEY `Notifications_Token_idx` (`Token`),
+    KEY `Notifications_UserId_idx` (`UserId`)
+  ) ENGINE=InnoDB"
+));
+
+PREPARE stmt FROM @s;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;