docs: declare institutional architecture boundary

src/govoplan_dashboard/backend/manifest.py

@@ -15,6 +15,7 @@ from govoplan_core.core.modules import (
     ModuleManifest,
     NavItem,
 )
+from govoplan_core.core.provider_governance import declared_module_architecture
 from govoplan_core.core.views import ViewSurface
 from govoplan_core.db.base import Base
 from govoplan_dashboard.backend.db.models import DashboardLayout
@@ -97,6 +98,16 @@ manifest = ModuleManifest(
             order=20,
         ),
     ),
+    architecture=declared_module_architecture(
+        layer="data_reporting_integration",
+        kind="presentation",
+        maturity="vertical_slice",
+        documentation_ref="README.md",
+        test_ref="tests/test_dashboard_layouts.py",
+        known_limits=("Widget configuration depth and target accessibility evidence vary by contributing module.",),
+        owned_concepts=("dashboard layout", "widget placement", "view-specific dashboard"),
+        non_owned_concepts=("widget domain data", "report definition", "view policy"),
+    ),
 )