[fern-autoversion] chore: remove User-Agent header from default client options

Remove the hardcoded `User-Agent` header from the default headers set
in `normalizeClientOptions`. This is an internal SDK header cleanup
with no impact on public API surface or consumer-facing behavior.

Key changes:
- Remove `"User-Agent": "@vapi-ai/server-sdk/2.0.0"` from default request headers in `BaseClient.ts`
- Add `.fern/replay.lock`, `.fern/replay.yml`, and `.gitattributes` to `.fernignore`

🌿 Generated with Fern

Author: fern-api[bot]

.fern/metadata.json

@@ -16,5 +16,5 @@
     "invokedBy": "ci",
     "requestedVersion": "AUTO",
     "ciProvider": "unknown",
-    "sdkVersion": "0.0.0-fern-placeholder"
+    "sdkVersion": "2.0.1"
 }

package.json

@@ -1,6 +1,6 @@
 {
     "name": "@vapi-ai/server-sdk",
-    "version": "0.0.0-fern-placeholder",
+    "version": "2.0.1",
     "private": false,
     "repository": {
         "type": "git",

src/BaseClient.ts

@@ -52,8 +52,8 @@ export function normalizeClientOptions<T extends BaseClientOptions = BaseClientO
         {
             "X-Fern-Language": "JavaScript",
             "X-Fern-SDK-Name": "@vapi-ai/server-sdk",
-            "X-Fern-SDK-Version": "0.0.0-fern-placeholder",
-            "User-Agent": "@vapi-ai/server-sdk/0.0.0-fern-placeholder",
+            "X-Fern-SDK-Version": "2.0.1",
+            "User-Agent": "@vapi-ai/server-sdk/2.0.1",
             "X-Fern-Runtime": core.RUNTIME.type,
             "X-Fern-Runtime-Version": core.RUNTIME.version,
         },

src/version.ts

@@ -1 +1 @@
-export const SDK_VERSION = "0.0.0-fern-placeholder";
+export const SDK_VERSION = "2.0.1";