[fern-autoversion] chore: update .fernignore with additional ignored files

Add replay and gitattributes files to .fernignore so that Fern
regeneration does not overwrite or manage these project-specific
configuration files.

Key changes:
- Add `.fern/replay.lock` to .fernignore
- Add `.fern/replay.yml` to .fernignore
- Add `.gitattributes` to .fernignore

🌿 Generated with Fern

Author: fern-api[bot]

.fern/metadata.json

@@ -17,5 +17,5 @@
   "invokedBy": "ci",
   "requestedVersion": "AUTO",
   "ciProvider": "unknown",
-  "sdkVersion": "0.0.0-fern-placeholder"
+  "sdkVersion": "2.0.1"
 }

src/Vapi.Net/Core/Public/Version.cs

@@ -3,5 +3,5 @@ namespace Vapi.Net;
 [Serializable]
 internal class Version
 {
-    public const string Current = "0.0.0-fern-placeholder";
+    public const string Current = "2.0.1";
 }

src/Vapi.Net/Vapi.Net.csproj

@@ -4,7 +4,7 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <LangVersion>12</LangVersion>
     <Nullable>enable</Nullable>
-    <Version>0.0.0-fern-placeholder</Version>
+    <Version>2.0.1</Version>
     <AssemblyVersion>$(Version)</AssemblyVersion>
     <FileVersion>$(Version)</FileVersion>
     <PackageReadmeFile>README.md</PackageReadmeFile>

src/Vapi.Net/VapiClient.cs

@@ -15,7 +15,7 @@ public VapiClient(string? token = null, ClientOptions? clientOptions = null)
                 { "X-Fern-Language", "C#" },
                 { "X-Fern-SDK-Name", "Vapi.Net" },
                 { "X-Fern-SDK-Version", Version.Current },
-                { "User-Agent", "Vapi.Net/0.0.0-fern-placeholder" },
+                { "User-Agent", "Vapi.Net/2.0.1" },
             }
         );
         foreach (var header in platformHeaders)