Implement schedule WYSIWYG and UTC dates

src/db/index.js

@@ -206,6 +206,35 @@ async function ensureSchema(pool, options) {
     ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
   `);
 
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS i_schedule_groups (
+      id INT AUTO_INCREMENT PRIMARY KEY,
+      name VARCHAR(255) NOT NULL,
+      short_description VARCHAR(255) NULL,
+      created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+      created_by INT NULL,
+      modified_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+      modified_by INT NULL
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+  `);
+
+  await pool.query(`
+    CREATE TABLE IF NOT EXISTS i_schedule_entries (
+      id INT AUTO_INCREMENT PRIMARY KEY,
+      schedule_group_id INT NOT NULL,
+      title VARCHAR(255) NOT NULL,
+      short_description VARCHAR(255) NULL,
+      start_datetime DATETIME NOT NULL,
+      end_datetime DATETIME NULL,
+      created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+      created_by INT NULL,
+      modified_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+      modified_by INT NULL,
+      CONSTRAINT fk_schedule_entries_group FOREIGN KEY (schedule_group_id) REFERENCES i_schedule_groups(id) ON DELETE CASCADE,
+      INDEX idx_schedule_entries_group_start (schedule_group_id, start_datetime)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+  `);
+
   await pool.query(`
     CREATE TABLE IF NOT EXISTS d_onboarding_devices (
       device_id VARCHAR(128) PRIMARY KEY,