docs: annotate astrolabe integration tests as cross-system interface tests

Add cross-system interface test annotations to the 5 astrolabe test files,
clarifying they test the MCP server's integration with the Astrolabe
Nextcloud app (installed from the app store, source now in a separate repo).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/integration/test_astrolabe_multi_user_background_sync.py

@@ -1,5 +1,10 @@
 """Integration test for multi-user Astrolabe background sync enablement.
 
+Cross-system interface test: Tests the MCP server's integration with the
+Astrolabe Nextcloud app, which is installed from the Nextcloud app store via
+app-hooks/post-installation/20-install-astrolabe-app.sh. Astrolabe source
+lives in a separate repository (https://github.com/cbcoutinho/astrolabe).
+
 This test verifies that multiple users can independently:
 1. Log in to Nextcloud
 2. Generate an app password in Security settings

tests/integration/test_astrolabe_plotly_visualization.py

@@ -1,5 +1,10 @@
 """Integration test for Astrolabe Plotly 3D visualization with multi-user BasicAuth mode.
 
+Cross-system interface test: Tests the MCP server's integration with the
+Astrolabe Nextcloud app, which is installed from the Nextcloud app store via
+app-hooks/post-installation/20-install-astrolabe-app.sh. Astrolabe source
+lives in a separate repository (https://github.com/cbcoutinho/astrolabe).
+
 This test verifies that:
 1. User can provision background sync access via app password
 2. Content created via MCP tools is indexed by vector sync

tests/integration/test_astrolabe_settings_buttons.py

@@ -1,5 +1,10 @@
 """Integration tests for Astrolabe personal settings page buttons.
 
+Cross-system interface test: Tests the MCP server's integration with the
+Astrolabe Nextcloud app, which is installed from the Nextcloud app store via
+app-hooks/post-installation/20-install-astrolabe-app.sh. Astrolabe source
+lives in a separate repository (https://github.com/cbcoutinho/astrolabe).
+
 Tests the button functionality on /settings/user/astrolabe:
 1. Disable Indexing button (POST to /apps/astrolabe/api/revoke)
 2. Disconnect button (POST to /apps/astrolabe/oauth/disconnect)

tests/integration/test_astrolabe_token_refresh.py

@@ -1,5 +1,10 @@
 """Integration tests for Astrolabe token refresh flow.
 
+Cross-system interface test: Tests the MCP server's integration with the
+Astrolabe Nextcloud app, which is installed from the Nextcloud app store via
+app-hooks/post-installation/20-install-astrolabe-app.sh. Astrolabe source
+lives in a separate repository (https://github.com/cbcoutinho/astrolabe).
+
 Tests the token refresh mechanism between Astrolabe (Nextcloud app)
 and the MCP server backend in a multi-user basic auth deployment.
 

tests/server/oauth/test_astrolabe_multi_server_integration.py

@@ -1,5 +1,10 @@
 """Test Astrolabe integration with multiple MCP server deployments.
 
+Cross-system interface test: Tests the MCP server's integration with the
+Astrolabe Nextcloud app, which is installed from the Nextcloud app store via
+app-hooks/post-installation/20-install-astrolabe-app.sh. Astrolabe source
+lives in a separate repository (https://github.com/cbcoutinho/astrolabe).
+
 This test suite verifies that the Astrolabe app can be dynamically configured
 to connect to different MCP server deployments (mcp-oauth, mcp-keycloak, etc.).