feat(csharp): bump driver version to 1.1.0 (#386)

## Summary

- Updates `hiveserver2` submodule to pick up
[adbc-drivers/hiveserver2#32](adbc-drivers/hiveserver2#32),
which makes `ProductVersionDefault` a virtual property in
`SparkConnection`
- Overrides `ProductVersionDefault` in `DatabricksConnection` to report
`1.1.0` in User-Agent headers

## Test plan

- [ ] Verify User-Agent header reports `ADBCDatabricksDriver/1.1.0` in
query history

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: eric-wang-1990

csharp/Directory.Packages.props

@@ -25,7 +25,7 @@
     <PackageVersion Include="K4os.Compression.LZ4.Streams" Version="1.3.8" />
     <PackageVersion Include="Microsoft.IO.RecyclableMemoryStream" Version="3.0.1" />
     <!-- Testing -->
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
     <PackageVersion Include="xunit" Version="2.9.3" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
     <PackageVersion Include="Xunit.SkippableFact" Version="1.5.61" />

csharp/hiveserver2

@@ -51,6 +51,7 @@ namespace AdbcDrivers.Databricks
     internal class DatabricksConnection : SparkHttpConnection
     {
         internal const string DatabricksDriverName = "ADBC Databricks Driver";
+        internal const string DriverVersion = "1.1.0";
         internal static new readonly string s_assemblyName = ApacheUtility.GetAssemblyName(typeof(DatabricksConnection));
         internal static new readonly string s_assemblyVersion = ApacheUtility.GetAssemblyVersion(typeof(DatabricksConnection));
 
@@ -441,6 +442,7 @@ protected override HttpMessageHandler CreateHttpHandler()
         protected override bool GetObjectsPatternsRequireLowerCase => true;
 
         protected override string DriverName => DatabricksDriverName;
+        protected override string ProductVersionDefault => DriverVersion;
 
         /// <summary>
         /// Overrides GetObjects to emit telemetry with appropriate operation type based on depth.

csharp/src/DatabricksConnection.cs

@@ -352,7 +352,7 @@ private string GetUserAgent(IReadOnlyDictionary<string, string> properties)
         {
             // Use DatabricksJDBCDriverOSS prefix for server-side feature compatibility
             // (e.g., INLINE_OR_EXTERNAL_LINKS disposition support)
-            string baseUserAgent = $"DatabricksJDBCDriverOSS/{AssemblyVersion} (ADBC)";
+            string baseUserAgent = $"DatabricksJDBCDriverOSS/{DatabricksConnection.DriverVersion} (ADBC)";
 
             // Check if a client has provided a user-agent entry
             string userAgentEntry = PropertyHelper.GetStringProperty(properties, "adbc.spark.user_agent_entry", string.Empty);