chore(typescript): release 3.70.3

Author: github-actions[bot]

…es/unreleased/fix-header-auth-prefix.yml …hanges/3.70.3/fix-header-auth-prefix.ymlgenerators/typescript/sdk/changes/unreleased/fix-header-auth-prefix.yml renamed to generators/typescript/sdk/changes/3.70.3/fix-header-auth-prefix.yml generators/typescript/sdk/changes/unreleased/fix-header-auth-prefix.yml renamed to generators/typescript/sdk/changes/3.70.3/fix-header-auth-prefix.yml

@@ -1,4 +1,15 @@
 # yaml-language-server: $schema=../../../fern-versions-yml.schema.json
+- version: 3.70.3
+  changelogEntry:
+    - summary: |
+        Honor the auth scheme `prefix` for `HeaderAuthScheme` when generating `HeaderAuthProvider`.
+        Previously, the generator emitted the raw header value into the configured header (e.g.
+        `Authorization`) and dropped any prefix declared in the API definition (e.g. `Bearer`).
+        The provider now emits a `HEADER_PREFIX` constant and prepends it to the header value,
+        matching the behavior of the Java, Python, Go, C#, PHP, Rust, and Ruby v2 generators.
+      type: fix
+  createdAt: "2026-05-08"
+  irVersion: 66
 - version: 3.70.2
   changelogEntry:
     - summary: |