feat: add content navigation and tenant configuration

Tiku.IntegrationTests/PersistenceModelTests.cs

@@ -1,5 +1,6 @@
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Metadata;
+using Tiku.Domain.Content;
 using Tiku.Domain.QuestionBanks;
 using Tiku.Infrastructure.Persistence;
 
@@ -21,13 +22,46 @@ public sealed class PersistenceModelTests
             .Select(entity => entity.GetTableName())
             .ToHashSet(StringComparer.Ordinal);
 
-        Assert.Equal(20, tableNames.Count);
+        Assert.Equal(28, tableNames.Count);
         Assert.Contains("tenants", tableNames);
+        Assert.Contains("tenant_settings", tableNames);
+        Assert.Contains("content_entries", tableNames);
+        Assert.Contains("content_nodes", tableNames);
+        Assert.Contains("question_collections", tableNames);
+        Assert.Contains("practice_blueprints", tableNames);
         Assert.Contains("questions", tableNames);
         Assert.Contains("question_versions", tableNames);
         Assert.Contains("answer_records", tableNames);
     }
 
+    [Fact]
+    public void Content_node_path_is_mapped_to_ltree()
+    {
+        using var context = new TikuDbContext(Options);
+
+        var path = context.Model.FindEntityType(typeof(ContentNode))!
+            .FindProperty(nameof(ContentNode.Path))!;
+
+        Assert.Equal("ltree", path.GetColumnType());
+    }
+
+    [Fact]
+    public void Collection_relations_include_tenant_in_foreign_keys()
+    {
+        using var context = new TikuDbContext(Options);
+
+        var foreignKeys = context.Model.FindEntityType(typeof(QuestionCollection))!
+            .GetForeignKeys()
+            .Where(foreignKey => foreignKey.Properties.Count > 1)
+            .Select(foreignKey => foreignKey.Properties
+                .Select(property => property.Name)
+                .ToArray());
+
+        Assert.All(
+            foreignKeys,
+            properties => Assert.Contains("TenantId", properties));
+    }
+
     [Theory]
     [InlineData(nameof(Question.Tags), "'[]'::jsonb")]
     public void Question_json_properties_are_mapped_to_jsonb(