Update changelogs from fern repo

fern/products/cli-api-reference/cli-changelog/2025-09-22.mdx

@@ -7,7 +7,7 @@
 
 
 ## 0.78.4
-**`(fix):`** Collapse any combination of optional and nullable to `optional<nullable<T>>`.
+**`(fix):`** Collapse any combination of optional and nullable to optional<nullable<T>>.
 
 ## 0.78.3
 **`(chore):`** Support IR v59 in the Rust SDK generator.

fern/products/sdks/overview/typescript/changelog/2025-09-24.mdx

@@ -1,3 +1,27 @@
+## 3.2.0
+**`(feat):`** Add `generateEndpointMetadata` configuration to generate endpoint metadata for each endpoints.
+When you use a callback function to generate headers or auth tokens, the endpoint metadata will be passed to the callback.
+```ts
+const client = new Foo({
+    ...,
+    token: ({ endpointMetadata }) => {
+        // generate token based on endpoint metadata
+    }
+});
+```
+
+To enable this, set `generateEndpointMetadata` to `true` in the `config` of your generator configuration.
+```yml
+# In generators.yml
+groups:
+  ts-sdk:
+    generators:
+      - name: fernapi/fern-typescript-sdk
+        config:
+          generateEndpointMetadata: true
+```
+
+
 ## 3.1.2
 **`(fix):`** Pin `msw` dependency to `2.11.2` because newer version introduces jest/vitest compatibility issues.