fix: use @remotion/lambda/client to avoid @rspack/binding in serverless

The main @remotion/lambda entry point re-exports from @remotion/bundler
which pulls in @rspack/core → @rspack/binding (native binary). The /client
subpath only exports renderMediaOnLambda + getRenderProgress without the
bundler dependency chain. This is the official Remotion approach for
serverless environments.

Author: Miriad

lib/services/remotion.ts

@@ -21,7 +21,7 @@ import {
   renderMediaOnLambda,
   getRenderProgress,
   type AwsRegion,
-} from "@remotion/lambda";
+} from "@remotion/lambda/client";
 
 // ---------------------------------------------------------------------------
 // Types