feat: add tenant and user management with migrations, handlers, and tests

- Implemented tenant and user management features including:
  - Tenant creation and management with associated migrations.
  - User creation and management with associated migrations.
  - Tenant membership management with associated migrations.
  - Platform user roles management with associated migrations.
  - Quota management with associated migrations.
  - Article and template management with associated migrations.
- Added HTTP handlers for templates and workspaces.
- Created tests for protected and public routes.
- Introduced a script to check tenant scope in SQL queries.
- Documented task plan for backend completion and frontend foundation.

apps/admin-web/src/views/FeatureStubView.vue

@@ -0,0 +1,38 @@
+<script setup lang="ts">
+import { computed } from "vue";
+import { useRoute } from "vue-router";
+import { useI18n } from "vue-i18n";
+
+const route = useRoute();
+const { t } = useI18n();
+
+const title = computed(() => t(String(route.meta.titleKey ?? "common.details")));
+const description = computed(() => t(String(route.meta.descriptionKey ?? "common.noData")));
+</script>
+
+<template>
+  <section class="stub-view">
+    <div class="stub-view__hero">
+      <p class="eyebrow">{{ t("featureStub.eyebrow") }}</p>
+      <h2>{{ title }}</h2>
+      <p>{{ description }}</p>
+    </div>
+
+    <div class="stub-view__grid">
+      <article class="stub-card">
+        <h3>{{ t("featureStub.currentStatus") }}</h3>
+        <p>{{ t("featureStub.currentStatusText") }}</p>
+      </article>
+
+      <article class="stub-card">
+        <h3>{{ t("featureStub.nextPriority") }}</h3>
+        <p>{{ description }}</p>
+      </article>
+
+      <article class="stub-card">
+        <h3>{{ t("featureStub.integrationStrategy") }}</h3>
+        <p>{{ t("featureStub.integrationStrategyText") }}</p>
+      </article>
+    </div>
+  </section>
+</template>