feat(astrolabe): add Nextcloud PHP app for MCP server management

Adds a native Nextcloud app "Astroglobe" that provides:
- Personal settings: OAuth authorization for background MCP access
- Admin settings: Server status and vector sync monitoring
- API endpoints for MCP server communication

The app uses PKCE OAuth flow to obtain tokens for the MCP server,
enabling features like background vector sync per ADR-018.

Includes:
- PHP app structure (controllers, services, settings)
- Vue.js frontend components
- Docker compose mount configuration
- Installation hook for development testing
- ADR-018 documentation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

third_party/astroglobe/rector.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+
+return RectorConfig::configure()
+	->withPaths([
+		__DIR__ . '/lib',
+		__DIR__ . '/tests',
+	])
+	->withPhpSets(php80: true)
+	->withPreparedSets(
+		deadCode: true,
+		codeQuality: true,
+		codingStyle: true,
+		typeDeclarations: true,
+		privatization: true,
+		instanceOf: true,
+		earlyReturn: true,
+		strictBooleans: true,
+		carbon: true,
+		rectorPreset: true,
+		phpunitCodeQuality: true,
+		doctrineCodeQuality: true,
+		symfonyCodeQuality: true,
+		symfonyConfigs: true,
+		twig: true,
+		phpunit: true,
+	);