refactor: remove Health Monitor plugin - heartbeat built into core (#115)

The health monitor/Grafana heartbeat is mandatory infrastructure that
must always be active. The core system plugin (plg_system_mokowaas)
already has handleGrafanaProvisioning() and sendHeartbeat(), making
the separate monitor plugin redundant.

- Removed plg_system_mokowaas_monitor from package manifest
- Removed from script.php enable/protect lists
- Removed from cascade enable/disable logic
- Removed from dashboard plugin metadata
- Excluded from dashboard plugin discovery query
- Disabled on dev server (can be uninstalled manually)

Health monitoring is now entirely handled by the core plugin which
is protected and cannot be disabled.

Authored-by: Moko Consulting
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/packages/com_mokowaas/admin/src/Model/DashboardModel.php

@@ -53,14 +53,6 @@ class DashboardModel extends BaseDatabaseModel
 			'protected'      => false,
 			'configure_only' => true,
 		],
-		'mokowaas_monitor' => [
-			'icon'           => 'icon-heartbeat',
-			'category'       => 'monitoring',
-			'label'          => 'Health Monitor',
-			'description'    => 'Site health checks, Grafana heartbeat integration, and diagnostics.',
-			'protected'      => true,
-			'configure_only' => false,
-		],
 		'mokowaasdemo' => [
 			'icon'           => 'icon-undo',
 			'category'       => 'content',
@@ -118,7 +110,8 @@ class DashboardModel extends BaseDatabaseModel
 					'(' . $db->quoteName('type') . ' = ' . $db->quote('plugin')
 						. ' AND ' . $db->quoteName('folder') . ' = ' . $db->quote('system')
 						. ' AND (' . $db->quoteName('element') . ' = ' . $db->quote('mokowaas')
-						. ' OR ' . $db->quoteName('element') . ' LIKE ' . $db->quote('mokowaas\_%') . '))'
+						. ' OR ' . $db->quoteName('element') . ' LIKE ' . $db->quote('mokowaas\_%') . ')'
+					. ' AND ' . $db->quoteName('element') . ' != ' . $db->quote('mokowaas_monitor') . ')'
 					// Webservices plugins
 					. ' OR (' . $db->quoteName('type') . ' = ' . $db->quote('plugin')
 						. ' AND ' . $db->quoteName('folder') . ' = ' . $db->quote('webservices')

src/packages/plg_system_mokowaas/Extension/MokoWaaS.php

@@ -1509,7 +1509,6 @@ class MokoWaaS extends CMSPlugin implements BootableExtensionInterface
 				$db->quote('mokowaas_firewall'),
 				$db->quote('mokowaas_tenant'),
 				$db->quote('mokowaas_devtools'),
-				$db->quote('mokowaas_monitor'),
 				$db->quote('mod_mokowaas_cpanel'),
 			];
 

src/pkg_mokowaas.xml

@@ -17,7 +17,6 @@
 		<file type="plugin" id="plg_system_mokowaas_firewall" group="system">plg_system_mokowaas_firewall.zip</file>
 		<file type="plugin" id="plg_system_mokowaas_tenant" group="system">plg_system_mokowaas_tenant.zip</file>
 		<file type="plugin" id="plg_system_mokowaas_devtools" group="system">plg_system_mokowaas_devtools.zip</file>
-		<file type="plugin" id="plg_system_mokowaas_monitor" group="system">plg_system_mokowaas_monitor.zip</file>
 		<file type="component" id="com_mokowaas">com_mokowaas.zip</file>
 		<file type="module" id="mod_mokowaas_cpanel" client="administrator">mod_mokowaas_cpanel.zip</file>
 		<file type="plugin" id="plg_webservices_mokowaas" group="webservices">plg_webservices_mokowaas.zip</file>

src/script.php

@@ -41,7 +41,6 @@ class Pkg_MokowaasInstallerScript
 		$this->enablePlugin('system', 'mokowaas_firewall');
 		$this->enablePlugin('system', 'mokowaas_tenant');
 		$this->enablePlugin('system', 'mokowaas_devtools');
-		$this->enablePlugin('system', 'mokowaas_monitor');
 		$this->enablePlugin('webservices', 'mokowaas');
 		$this->enablePlugin('task', 'mokowaasdemo');
 		$this->enablePlugin('task', 'mokowaassync');
@@ -211,7 +210,6 @@ class Pkg_MokowaasInstallerScript
 				$db->quote('mokowaas_firewall'),
 				$db->quote('mokowaas_tenant'),
 				$db->quote('mokowaas_devtools'),
-				$db->quote('mokowaas_monitor'),
 				$db->quote('com_mokowaas'),
 				$db->quote('mod_mokowaas_cpanel'),
 				$db->quote('mokowaasdemo'),