feat: add tenant provisioning and key lifecycle (#5)

Closes #5

src/FinalFactory.Rendezvous.Server/Program.cs

@@ -1,15 +1,15 @@
 using System.Net;
 using FinalFactory.Rendezvous.Contracts;
 using FinalFactory.Rendezvous.Server.Http;
+using FinalFactory.Rendezvous.Server.Provisioning;
 using FinalFactory.Rendezvous.Server.Transport;
 using Microsoft.OpenApi;
 
 WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
-bool isOpenApiGeneration = Environment.GetCommandLineArgs().Any(static argument =>
-    string.Equals(
-        Path.GetFileName(argument),
-        "dotnet-getdocument.dll",
-        StringComparison.OrdinalIgnoreCase));
+bool isOpenApiGeneration = string.Equals(
+    System.Reflection.Assembly.GetEntryAssembly()?.GetName().Name,
+    "GetDocument.Insider",
+    StringComparison.Ordinal);
 
 builder.Services.AddOpenApi("v1", static options =>
     options.AddSchemaTransformer(static (schema, context, cancellationToken) =>
@@ -34,6 +34,30 @@ builder.Services.AddOpenApi("v1", static options =>
     }));
 builder.Services.ConfigureHttpJsonOptions(static options =>
     ContractJson.Configure(options.SerializerOptions));
+
+if (isOpenApiGeneration)
+{
+    builder.Services.AddSingleton(new ProvisioningReadiness(false));
+}
+else
+{
+    ProvisioningOptions provisioningOptions = builder.Configuration
+        .GetSection(ProvisioningOptions.SectionName)
+        .Get<ProvisioningOptions>() ?? new ProvisioningOptions();
+    ISecretProvider secretProvider = builder.Environment.IsDevelopment()
+        ? new EphemeralDevelopmentSecretProvider()
+        : new EnvironmentSecretProvider();
+    ProvisioningRuntime provisioning = ProvisioningRuntime.Create(
+        provisioningOptions,
+        secretProvider,
+        DateTimeOffset.UtcNow);
+    builder.Services.AddSingleton(provisioning);
+    builder.Services.AddSingleton(provisioning.Policies);
+    builder.Services.AddSingleton(provisioning.Credentials);
+    builder.Services.AddSingleton(provisioning.PublisherAuthorization);
+    builder.Services.AddSingleton(new ProvisioningReadiness(true));
+}
+
 builder.Services
     .AddOptions<UdpMediatorOptions>()
     .BindConfiguration(UdpMediatorOptions.SectionName)
@@ -61,7 +85,8 @@ app.MapGet(
     .WithTags("Health");
 app.MapGet(
     "/health/ready",
-    static (UdpMediatorService mediator) => mediator.LocalEndpoint is null
+    static (UdpMediatorService mediator, ProvisioningReadiness provisioning) =>
+        mediator.LocalEndpoint is null || !provisioning.IsReady
         ? Results.StatusCode(StatusCodes.Status503ServiceUnavailable)
         : Results.Ok(new HealthResponse { Status = "ready" }))
     .Produces<HealthResponse>()