feat: complete remaining jetstream parity implementation plan

src/NATS.Server/JetStream/Models/ConsumerConfig.cs

@@ -5,6 +5,8 @@ public sealed class ConsumerConfig
     public string DurableName { get; set; } = string.Empty;
     public string? FilterSubject { get; set; }
     public AckPolicy AckPolicy { get; set; } = AckPolicy.None;
+    public DeliverPolicy DeliverPolicy { get; set; } = DeliverPolicy.All;
+    public ReplayPolicy ReplayPolicy { get; set; } = ReplayPolicy.Instant;
     public int AckWaitMs { get; set; } = 30_000;
     public int MaxDeliver { get; set; } = 1;
     public bool Push { get; set; }
@@ -15,4 +17,5 @@ public enum AckPolicy
 {
     None,
     Explicit,
+    All,
 }