feat(browser): stream bounded live session updates (#26)

src/FinalFactory.Rendezvous.Server/Program.cs

@@ -255,6 +255,7 @@ builder.Services.Configure<HostOptions>(options =>
     options.ShutdownTimeout = TimeSpan.FromSeconds(deploymentOptions.DrainDeadlineSeconds + 10));
 
 SystemRendezvousClock rendezvousClock = new();
+SessionChangeJournal sessionChanges = new(new SessionChangeJournalOptions());
 EphemeralStoreOptions stateOptions = new()
 {
     GracefulDrainLifetime = TimeSpan.FromSeconds(deploymentOptions.DrainDeadlineSeconds),
@@ -262,8 +263,10 @@ EphemeralStoreOptions stateOptions = new()
 InMemoryEphemeralRendezvousStore stateStore = new(
     stateOptions,
     rendezvousClock,
-    rendezvousClock);
+    rendezvousClock,
+    sessionChanges);
 builder.Services.AddSingleton(stateStore);
+builder.Services.AddSingleton(sessionChanges);
 builder.Services.AddSingleton<IEphemeralRendezvousStore>(stateStore);
 builder.Services.AddSingleton<IWallClock>(rendezvousClock);
 builder.Services.AddSingleton<IMonotonicClock>(rendezvousClock);
@@ -297,7 +300,9 @@ else
     builder.Services.AddSingleton(SessionLeaseTiming.From(stateOptions));
     builder.Services.AddSingleton<SessionLeaseService>();
     builder.Services.AddSingleton<SessionBrowserCursorCodec>();
+    builder.Services.AddSingleton<SessionStreamCursorCodec>();
     builder.Services.AddSingleton<SessionBrowserService>();
+    builder.Services.AddSingleton<SessionStreamService>();
     builder.Services.AddSingleton<JoinAttemptCursorCodec>();
     builder.Services.AddSingleton<JoinAttemptService>();
     builder.Services.AddSingleton<ConnectionOutcomeMetrics>();