feat: add presence-gated session leases (#7)

Closes #7

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

@@ -4,6 +4,15 @@ namespace FinalFactory.Rendezvous.Tests.Contracts;
 
 public sealed class ContractLimitTests
 {
+    [Fact]
+    public void RequiredPlayerFacingTextRejectsEmptyOrWhitespaceValues()
+    {
+        Assert.False(ContractValidation.IsBuildVersionValid(string.Empty));
+        Assert.False(ContractValidation.IsBuildVersionValid("   "));
+        Assert.False(ContractValidation.IsDisplayNameValid(string.Empty));
+        Assert.False(ContractValidation.IsDisplayNameValid("   "));
+    }
+
     [Fact]
     public void ByteAndCollectionLimitsAcceptTheBoundaryOnly()
     {

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

@@ -8,6 +8,7 @@ public sealed class ContractSerializationTests
     public static TheoryData<string, Type> GoldenJsonVectors => new()
     {
         { "register-session.json", typeof(RegisterSessionRequest) },
+        { "register-session-response.json", typeof(RegisterSessionResponse) },
         { "browse-sessions.json", typeof(BrowseSessionsResponse) },
         { "create-join-response.json", typeof(CreateJoinAttemptResponse) },
         { "api-error.json", typeof(ApiError) },

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

@@ -64,5 +64,26 @@ public sealed class OpenApiCompatibilityTests
             property.Contains("token", StringComparison.OrdinalIgnoreCase)
             || property.Contains("endpoint", StringComparison.OrdinalIgnoreCase)
             || property.Contains("playerId", StringComparison.OrdinalIgnoreCase));
+
+        JsonElement publisherBearer = root.GetProperty("components")
+            .GetProperty("securitySchemes")
+            .GetProperty("PublisherBearer");
+        Assert.Equal("http", publisherBearer.GetProperty("type").GetString());
+        Assert.Equal("bearer", publisherBearer.GetProperty("scheme").GetString());
+        (string Path, string Method)[] publisherOperations =
+        [
+            ("/v1/sessions", "post"),
+            ("/v1/sessions/{listingId}", "put"),
+            ("/v1/sessions/{listingId}", "delete"),
+            ("/v1/sessions/{listingId}/renew", "post"),
+        ];
+        foreach ((string operationPath, string method) in publisherOperations)
+        {
+            JsonElement security = root.GetProperty("paths")
+                .GetProperty(operationPath)
+                .GetProperty(method)
+                .GetProperty("security");
+            Assert.True(security[0].TryGetProperty("PublisherBearer", out _));
+        }
     }
 }