Fix: rename Data/ to Database/ to avoid gitignore collision

.gitignore has '/data' which Windows git (case-insensitive) silently
matched '/Data/', so AppDbContext.cs was never committed and the Docker
build (Linux, case-sensitive) failed with CS0234 'Data' not found.
Renaming the directory to 'Database/' sidesteps the collision.

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

Database/AppDbContext.cs

@@ -0,0 +1,21 @@
+using Microsoft.EntityFrameworkCore;
+using SoroushAsadi.Models;
+
+namespace SoroushAsadi.Database;
+
+public class AppDbContext(DbContextOptions<AppDbContext> options) : DbContext(options)
+{
+    public DbSet<ContentSection> ContentSections => Set<ContentSection>();
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<ContentSection>(e =>
+        {
+            e.ToTable("sections");
+            e.HasKey(x => x.Key);
+            e.Property(x => x.Key).HasColumnName("key");
+            e.Property(x => x.DataJson).HasColumnName("data");
+            e.Property(x => x.UpdatedAt).HasColumnName("updated_at");
+        });
+    }
+}

Program.cs

@@ -1,6 +1,6 @@
 using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.EntityFrameworkCore;
-using SoroushAsadi.Data;
+using SoroushAsadi.Database;
 using SoroushAsadi.Services;
 
 var builder = WebApplication.CreateBuilder(args);

Services/ContentService.cs

@@ -1,6 +1,6 @@
 using System.Text.Json;
 using System.Text.Json.Nodes;
-using SoroushAsadi.Data;
+using SoroushAsadi.Database;
 
 namespace SoroushAsadi.Services;