Refactor runtime bootstrap and ship control flows

apps/backend/Shared/Runtime/AppVersionService.cs

@@ -0,0 +1,29 @@
+using System.Reflection;
+using Microsoft.Extensions.Hosting;
+
+namespace SpaceGame.Api.Shared.Runtime;
+
+public sealed class AppVersionService
+{
+    private readonly VersionInfoSnapshot _snapshot;
+
+    public AppVersionService(IHostEnvironment environment)
+    {
+        var assembly = Assembly.GetEntryAssembly() ?? Assembly.GetExecutingAssembly();
+        var informationalVersion = assembly
+            .GetCustomAttribute<AssemblyInformationalVersionAttribute>()?
+            .InformationalVersion;
+        var assemblyVersion = assembly.GetName().Version?.ToString() ?? "0.0.0";
+        var version = string.IsNullOrWhiteSpace(informationalVersion) ? assemblyVersion : informationalVersion;
+        var commitSha = Environment.GetEnvironmentVariable("SPACEGAME_COMMIT_SHA")
+          ?? Environment.GetEnvironmentVariable("GIT_COMMIT_SHA");
+
+        _snapshot = new VersionInfoSnapshot(
+          version,
+          environment.EnvironmentName,
+          string.IsNullOrWhiteSpace(commitSha) ? null : commitSha,
+          DateTimeOffset.UtcNow);
+    }
+
+    public VersionInfoSnapshot GetSnapshot() => _snapshot;
+}