Make Timestamp and TimeDuration special types (#233)

## Description of Changes

C# part of clockworklabs/SpacetimeDB#1836
Needs to be rebased onto
#220
once that is merged.

## API

 - [x] This is an API breaking change to the SDK

ScheduleAt is now constructed in slightly different ways.

## Requires SpacetimeDB PRs
*List any PRs here that are required for this SDK change to work*

## Testsuite
*If you would like to run the your SDK changes in this PR against a
specific SpacetimeDB branch, specify that here. This can be a branch
name or a link to a PR.*

SpacetimeDB branch name: phoebe/timestamp-special-type

## Testing
Will need an update to blackholio as well.

SpacetimeDB.ClientSDK.csproj

@@ -21,6 +21,7 @@
     <DefaultItemExcludes>$(DefaultItemExcludes);*~/**</DefaultItemExcludes>
     <!-- We want to save DLLs for Unity which doesn't support NuGet. -->
     <RestorePackagesPath>packages</RestorePackagesPath>
+    <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
   </PropertyGroup>
 
   <ItemGroup>
@@ -29,6 +30,8 @@
     <InternalsVisibleTo Include="SpacetimeDB.Tests" />
   </ItemGroup>
 
+
+
   <ItemGroup>
     <None Update="logo.png" Pack="true" PackagePath="" />
     <None Update="README.md" Pack="true" PackagePath="" />

examples~/quickstart/client/client.csproj

@@ -2,12 +2,13 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <CheckEolTargetFramework>false</CheckEolTargetFramework>
     <ImplicitUsings>disable</ImplicitUsings>
     <Nullable>enable</Nullable>
 
     <IsPackable>false</IsPackable>
+    <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
   </PropertyGroup>
 
   <ItemGroup>

examples~/quickstart/client/module_bindings/Types/Message.g.cs

@@ -16,13 +16,13 @@ public sealed partial class Message
         [DataMember(Name = "sender")]
         public SpacetimeDB.Identity Sender;
         [DataMember(Name = "sent")]
-        public ulong Sent;
+        public SpacetimeDB.Timestamp Sent;
         [DataMember(Name = "text")]
         public string Text;
 
         public Message(
             SpacetimeDB.Identity Sender,
-            ulong Sent,
+            SpacetimeDB.Timestamp Sent,
             string Text
         )
         {

src/Event.cs

@@ -18,7 +18,7 @@ Unit OutOfEnergy
     )>;
 
     public record ReducerEvent<R>(
-        DateTimeOffset Timestamp,
+        Timestamp Timestamp,
         Status Status,
         Identity CallerIdentity,
         Address? CallerAddress,

src/SpacetimeDB/ClientApi/InitialSubscription.g.cs

@@ -17,18 +17,18 @@ public sealed partial class InitialSubscription
         public DatabaseUpdate DatabaseUpdate;
         [DataMember(Name = "request_id")]
         public uint RequestId;
-        [DataMember(Name = "total_host_execution_duration_micros")]
-        public ulong TotalHostExecutionDurationMicros;
+        [DataMember(Name = "total_host_execution_duration")]
+        public SpacetimeDB.TimeDuration TotalHostExecutionDuration;
 
         public InitialSubscription(
             DatabaseUpdate DatabaseUpdate,
             uint RequestId,
-            ulong TotalHostExecutionDurationMicros
+            SpacetimeDB.TimeDuration TotalHostExecutionDuration
         )
         {
             this.DatabaseUpdate = DatabaseUpdate;
             this.RequestId = RequestId;
-            this.TotalHostExecutionDurationMicros = TotalHostExecutionDurationMicros;
+            this.TotalHostExecutionDuration = TotalHostExecutionDuration;
         }
 
         public InitialSubscription()

src/SpacetimeDB/ClientApi/OneOffQueryResponse.g.cs

@@ -19,20 +19,20 @@ public sealed partial class OneOffQueryResponse
         public string? Error;
         [DataMember(Name = "tables")]
         public System.Collections.Generic.List<OneOffTable> Tables;
-        [DataMember(Name = "total_host_execution_duration_micros")]
-        public ulong TotalHostExecutionDurationMicros;
+        [DataMember(Name = "total_host_execution_duration")]
+        public SpacetimeDB.TimeDuration TotalHostExecutionDuration;
 
         public OneOffQueryResponse(
             System.Collections.Generic.List<byte> MessageId,
             string? Error,
             System.Collections.Generic.List<OneOffTable> Tables,
-            ulong TotalHostExecutionDurationMicros
+            SpacetimeDB.TimeDuration TotalHostExecutionDuration
         )
         {
             this.MessageId = MessageId;
             this.Error = Error;
             this.Tables = Tables;
-            this.TotalHostExecutionDurationMicros = TotalHostExecutionDurationMicros;
+            this.TotalHostExecutionDuration = TotalHostExecutionDuration;
         }
 
         public OneOffQueryResponse()

src/SpacetimeDB/ClientApi/TransactionUpdate.g.cs

@@ -16,7 +16,7 @@ public sealed partial class TransactionUpdate
         [DataMember(Name = "status")]
         public UpdateStatus Status;
         [DataMember(Name = "timestamp")]
-        public Timestamp Timestamp;
+        public SpacetimeDB.Timestamp Timestamp;
         [DataMember(Name = "caller_identity")]
         public SpacetimeDB.Identity CallerIdentity;
         [DataMember(Name = "caller_address")]
@@ -25,17 +25,17 @@ public sealed partial class TransactionUpdate
         public ReducerCallInfo ReducerCall;
         [DataMember(Name = "energy_quanta_used")]
         public EnergyQuanta EnergyQuantaUsed;
-        [DataMember(Name = "host_execution_duration_micros")]
-        public ulong HostExecutionDurationMicros;
+        [DataMember(Name = "total_host_execution_duration")]
+        public SpacetimeDB.TimeDuration TotalHostExecutionDuration;
 
         public TransactionUpdate(
             UpdateStatus Status,
-            Timestamp Timestamp,
+            SpacetimeDB.Timestamp Timestamp,
             SpacetimeDB.Identity CallerIdentity,
             SpacetimeDB.Address CallerAddress,
             ReducerCallInfo ReducerCall,
             EnergyQuanta EnergyQuantaUsed,
-            ulong HostExecutionDurationMicros
+            SpacetimeDB.TimeDuration TotalHostExecutionDuration
         )
         {
             this.Status = Status;
@@ -44,13 +44,12 @@ ulong HostExecutionDurationMicros
             this.CallerAddress = CallerAddress;
             this.ReducerCall = ReducerCall;
             this.EnergyQuantaUsed = EnergyQuantaUsed;
-            this.HostExecutionDurationMicros = HostExecutionDurationMicros;
+            this.TotalHostExecutionDuration = TotalHostExecutionDuration;
         }
 
         public TransactionUpdate()
         {
             this.Status = null!;
-            this.Timestamp = new();
             this.ReducerCall = new();
             this.EnergyQuantaUsed = new();
         }

src/SpacetimeDBClient.cs

@@ -601,7 +601,7 @@ PreProcessedMessage PreProcessMessage(UnprocessedMessage unprocessed)
                         try
                         {
                             reducerEvent = new(
-                                DateTimeOffset.FromUnixTimeMilliseconds((long)transactionUpdate.Timestamp.Microseconds / 1000),
+                                (DateTimeOffset)transactionUpdate.Timestamp,
                                 transactionUpdate.Status switch
                                 {
                                     UpdateStatus.Committed => Committed,
@@ -908,7 +908,7 @@ private void OnMessageProcessComplete(PreProcessedMessage preProcessed)
                     {
                         var reducer = transactionUpdate.ReducerCall.ReducerName;
                         stats.ParseMessageTracker.InsertRequest(timestamp, $"type={nameof(ServerMessage.TransactionUpdate)},reducer={reducer}");
-                        var hostDuration = TimeSpan.FromMilliseconds(transactionUpdate.HostExecutionDurationMicros / 1000.0d);
+                        var hostDuration = (TimeSpan)transactionUpdate.TotalHostExecutionDuration;
                         stats.AllReducersTracker.InsertRequest(hostDuration, $"reducer={reducer}");
                         var callerIdentity = transactionUpdate.CallerIdentity;
                         if (callerIdentity == Identity)