Add initial database migrations and schema initialization

.codacy.yml

@@ -0,0 +1,3 @@
+---
+exclude_paths:
+  - "HealthMonitoring/Migrations/**"

HealthMonitoring.Tests/Persistence/HealthMonitoringMigrationsTests.cs

@@ -0,0 +1,19 @@
+using HealthMonitoring.Persistence;
+using Microsoft.EntityFrameworkCore;
+
+namespace HealthMonitoring.Tests.Persistence;
+
+public sealed class HealthMonitoringMigrationsTests
+{
+    [Fact]
+    public void Health_monitoring_context_has_an_EF_migration()
+    {
+        var options = new DbContextOptionsBuilder<HealthMonitoringDbContext>()
+            .UseSqlServer("Server=(localdb)\\MSSQLLocalDB;Database=HealthMonitoringTest;")
+            .Options;
+
+        using var context = new HealthMonitoringDbContext(options);
+
+        Assert.NotEmpty(context.Database.GetMigrations());
+    }
+}

HealthMonitoring.Tests/Persistence/RepositoryTests.cs

@@ -89,7 +89,7 @@ private SqlServerTestDatabase(HealthMonitoringDbContext context)
             .UseSqlServer(connectionString)
             .Options;
         var context = new HealthMonitoringDbContext(options);
-        await context.Database.EnsureCreatedAsync();
+        await context.Database.MigrateAsync();
         return new SqlServerTestDatabase(context);
     }