feat: implement scoped join attempts and tickets (#10)

Closes #10

tests/FinalFactory.Rendezvous.Tests/Contracts/OpenApiCompatibilityTests.cs

@@ -9,6 +9,7 @@ public sealed class OpenApiCompatibilityTests
         "/health/live",
         "/health/ready",
         "/v1/join-attempts",
+        "/v1/join-attempts/{attemptId}",
         "/v1/join-attempts/{attemptId}/outcome",
         "/v1/sessions",
         "/v1/sessions/{listingId}",
@@ -85,5 +86,23 @@ public sealed class OpenApiCompatibilityTests
                 .GetProperty("security");
             Assert.True(security[0].TryGetProperty("PublisherBearer", out _));
         }
+
+        JsonElement cancelParameters = root.GetProperty("paths")
+            .GetProperty("/v1/join-attempts/{attemptId}")
+            .GetProperty("delete")
+            .GetProperty("parameters");
+        JsonElement cancelCapability = Assert.Single(cancelParameters.EnumerateArray(), static parameter =>
+            parameter.GetProperty("in").GetString() == "header"
+            && parameter.GetProperty("name").GetString()
+                == "X-Rendezvous-Client-Punch-Capability");
+        Assert.True(cancelCapability.GetProperty("required").GetBoolean());
+        JsonElement hostPollParameters = root.GetProperty("paths")
+            .GetProperty("/v1/sessions/{listingId}/join-attempts")
+            .GetProperty("get")
+            .GetProperty("parameters");
+        JsonElement leaseToken = Assert.Single(hostPollParameters.EnumerateArray(), static parameter =>
+            parameter.GetProperty("in").GetString() == "header"
+            && parameter.GetProperty("name").GetString() == "X-Rendezvous-Lease-Token");
+        Assert.True(leaseToken.GetProperty("required").GetBoolean());
     }
 }