feat: complete TASK-WP0-06 public cache

apps/api/src/app.ts

@@ -223,7 +223,9 @@ export async function createApp(options: CreateAppOptions = {}) {
         : undefined;
       if (!resource) return reply.code(404).send();
       reply.type(resource.mimeType);
+      reply.header("Cache-Control", "public, max-age=31536000, immutable");
       reply.header("Content-Disposition", "inline");
+      reply.header("ETag", `"sha256-${resource.sha256}"`);
       return resource.bytes;
     },
   );

apps/api/src/local-data-root.ts

@@ -89,6 +89,7 @@ export interface PublicAssetPayload {
   bytes: Buffer;
   mimeType: string;
   resourceVersion: string;
+  sha256: string;
 }
 
 export interface PublicAssetResolver {
@@ -333,6 +334,7 @@ export function createPublicAssetResolver(input: {
         bytes,
         mimeType: entry.mimeType,
         resourceVersion: entry.resourceVersion,
+        sha256,
       };
     },
   };