Add the update.install_now board command

src/main/java/com/ibrasoft/lensbridge/model/auth/Permission.java

@@ -57,7 +57,7 @@ public enum Permission implements GrantedAuthority {
 
     /** Recoverable, no data egress: chrome.reload, config.refresh. */
     BOARD_COMMAND_BENIGN(Authority.BOARD_COMMAND_BENIGN),
-    /** Takes a physical display down: kiosk.restart, system.reboot. */
+    /** Takes a physical display down: kiosk.restart, system.reboot, update.install_now. */
     BOARD_COMMAND_DISRUPTIVE(Authority.BOARD_COMMAND_DISRUPTIVE),
     /** Data egress: chrome.screenshot returns an image of a screen in a prayer space; logs.tail leaks internals. */
     BOARD_COMMAND_INSPECT(Authority.BOARD_COMMAND_INSPECT),

src/main/java/com/ibrasoft/lensbridge/model/board/commands/CommandKind.java

@@ -26,6 +26,8 @@ public enum CommandKind {
 
     KIOSK_RESTART("kiosk.restart", CommandRisk.DISRUPTIVE),
     SYSTEM_REBOOT("system.reboot", CommandRisk.DISRUPTIVE),
+    /** Takes the board off its content for the update screen, and may restart the agent. */
+    UPDATE_INSTALL_NOW("update.install_now", CommandRisk.DISRUPTIVE),
 
     CHROME_SCREENSHOT("chrome.screenshot", CommandRisk.INSPECT),
     LOGS_TAIL("logs.tail", CommandRisk.INSPECT);

src/main/java/com/ibrasoft/lensbridge/model/board/commands/CommandPayload.java

@@ -22,10 +22,11 @@
         @JsonSubTypes.Type(value = SystemRebootPayload.class,     name = "system.reboot"),
         @JsonSubTypes.Type(value = ConfigRefreshPayload.class,    name = "config.refresh"),
         @JsonSubTypes.Type(value = LogsTailPayload.class,         name = "logs.tail"),
+        @JsonSubTypes.Type(value = UpdateInstallNowPayload.class, name = "update.install_now"),
 })
 public sealed interface CommandPayload
         permits ChromeReloadPayload, ChromeScreenshotPayload, KioskRestartPayload,
-                SystemRebootPayload, ConfigRefreshPayload, LogsTailPayload {
+                SystemRebootPayload, ConfigRefreshPayload, LogsTailPayload, UpdateInstallNowPayload {
 
     String kind();
 }

src/main/java/com/ibrasoft/lensbridge/model/board/commands/UpdateInstallNowPayload.java

@@ -0,0 +1,10 @@
+package com.ibrasoft.lensbridge.model.board.commands;
+
+/**
+ * Check the release channels and install a new board app or agent now, instead of in the
+ * board's nightly install window. The board shows its update screen while it installs, and
+ * an agent update restarts the agent.
+ */
+public record UpdateInstallNowPayload() implements CommandPayload {
+    @Override public String kind() { return "update.install_now"; }
+}

src/test/java/com/ibrasoft/lensbridge/model/board/commands/CommandKindTest.java

@@ -60,9 +60,10 @@ void reloadAndConfigRefreshAreBenign() {
     }
 
     @Test
-    void restartAndRebootAreDisruptive() {
+    void restartRebootAndUpdateNowAreDisruptive() {
         assertThat(CommandKind.KIOSK_RESTART.getRisk()).isEqualTo(CommandRisk.DISRUPTIVE);
         assertThat(CommandKind.SYSTEM_REBOOT.getRisk()).isEqualTo(CommandRisk.DISRUPTIVE);
+        assertThat(CommandKind.UPDATE_INSTALL_NOW.getRisk()).isEqualTo(CommandRisk.DISRUPTIVE);
     }
 
     /** Both return device-side data to the caller. Neither may ride along with a reboot grant. */