Send SDK version as X-SDK-Version header

Move the cookie-banner SDK version from the POST consents
request body to a custom X-SDK-Version header sent on every
API call. The server now reads it from the header and the
CORS middleware allows it through preflight.

Signed-off-by: Émile Ré <emile@getprobo.com>

packages/cookie-banner/src/client.ts

@@ -288,7 +288,6 @@ export class CookieBannerClient {
       version: cfg.version,
       action,
       consent_data: consentData,
-      sdk_version: __SDK_VERSION__,
     };
     void fetchJSON<ConsentRecord>(url, { method: "POST", body })
       .then(() => void flush(this.bannerId))

packages/cookie-banner/src/http.ts

@@ -120,6 +120,7 @@ export async function fetchJSON<T>(
     credentials: "omit",
     headers: {
       Accept: "application/json",
+      "X-SDK-Version": __SDK_VERSION__,
       ...(body !== undefined && { "Content-Type": "application/json" }),
       ...headers,
     },