fix: updates_xml_build — tag 'dev' not 'development', client for all types

Two root causes of Joomla updater not finding MokoWaaS updates:

1. stabilityTagToInteger('development') looks for STABILITY_DEVELOPMENT
   which doesn't exist → defaults to STABLE. Changed to 'dev' which
   maps to STABILITY_DEV (0).

2. Missing <client> tag defaults to client_id=1 (administrator) in
   Joomla's ExtensionAdapter. Packages install with client_id=0 (site).
   Now adds <client>site</client> for all extension types.

Fixes: #129

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

cli/updates_xml_build.php

@@ -194,12 +194,14 @@ $stabilitySuffixMap = [
 	'development' => '-dev',
 ];
 
+// Joomla's stabilityTagToInteger() maps these to STABILITY_* constants.
+// MUST use 'dev' not 'development' — STABILITY_DEVELOPMENT does not exist.
 $stabilityTagMap = [
 	'stable'      => 'stable',
 	'rc'          => 'rc',
 	'beta'        => 'beta',
 	'alpha'       => 'alpha',
-	'development' => 'development',
+	'development' => 'dev',
 ];
 
 // -- Build update entries -----------------------------------------------------
@@ -212,11 +214,13 @@ $primaryVersion = $version . $primarySuffix;
 $downloadUrl = "{$giteaUrl}/{$org}/{$repo}/releases/download/{$releaseTag}/{$typePrefix}{$extElement}-{$primaryVersion}.zip";
 $infoUrl = "{$giteaUrl}/{$org}/{$repo}/releases/tag/{$releaseTag}";
 
-// Build client tag
+// Build client tag — Joomla defaults to client_id=1 (administrator) when missing.
+// Packages install with client_id=0 (site), so we MUST include <client>site</client>
+// for all types to prevent a mismatch that causes extension_id=0 in #__updates.
 $clientTag = '';
 if (!empty($extClient)) {
 	$clientTag = "    <client>{$extClient}</client>";
-} elseif ($extType === 'module' || $extType === 'plugin') {
+} else {
 	$clientTag = '    <client>site</client>';
 }