feat(M2): Persönliche Dashboards — Tabelle, CRUD, Lazy-Seed, RLS (#360)

- dashboards-Tabelle (Layout JSONB, Tabs, is_default, partial unique name index)
- 6 CRUD-Endpoints /api/v1/dashboards, Owner-only (saved_views-Präzedenz), Audit
- Lazy Default-Seed aus MiniApp-Registry (permission-gefiltert, 12-Spalten-Flow)
- CORE_PERMISSIONS dashboard:read/write (fixt Phantom-Permission in dashboard.py)
- Migration 0144: RLS crm_api+crm_worker + konvergenter Fix der 3 Phase-L-Policies
- Tests: test_dashboards_backend.py 23/23 (TDD rot->grün); Regression 162/163

app/main.py

@@ -46,6 +46,7 @@ from app.routes import (  # noqa: E402
     currencies,
     custom_field_definitions,
     dashboard,
+    dashboards,
     delegations,
     entity_history,
     entity_permissions,
@@ -566,6 +567,7 @@ def create_app() -> FastAPI:
     # require_active_plugin("contacts") protection.
     app.include_router(entity_permissions.router)
     app.include_router(dashboard.router)
+    app.include_router(dashboards.router)
     app.include_router(entity_history.router)
     app.include_router(import_export.router)
     app.include_router(plugins.router)