Enable more analyzers, drop log-and-rethrow in file activities and apply dotnet format

Use invariant culture when formatting ids, put cancellation tokens last in endpoint handlers, remove the
CS8618 pragmas and keep only the analyzer overrides that still apply.

backend/Tests/Musify.Infrastructure.Tests/TestSupport/InfrastructureTestFixture.cs

@@ -18,6 +18,8 @@ public sealed class InfrastructureTestFixture : IAsyncLifetime
     public const string S3SecretKey = "musify-test-secret";
     public const string S3Bucket = "musify-test-bucket";
 
+    private static readonly string[] S3Actions = ["Admin", "Read", "Write"];
+
     private readonly PostgreSqlContainer postgres = new PostgreSqlBuilder("postgres:17-alpine")
         .WithDatabase("musify_test")
         .WithUsername("postgres")
@@ -83,7 +85,7 @@ public sealed class InfrastructureTestFixture : IAsyncLifetime
                 {
                     name = "musify-test",
                     credentials = new[] { new { accessKey = S3AccessKey, secretKey = S3SecretKey } },
-                    actions = new[] { "Admin", "Read", "Write" }
+                    actions = S3Actions
                 }
             }
         });