slice 6 EdgarAdapter: fix full_text_search ETag caching (was not writing etags back); test asserts revalidation on 2nd call. 16/16 green (ornith-35)

app/server/src/adapters/EdgarAdapter.ts

@@ -283,6 +283,13 @@ export class EdgarAdapter implements SourceFetch {
 
     const searchData = resp?.body as { filings?: Array<Record<string, unknown>> } | undefined;
 
+    // Persist ETag + Last-Modified for future revalidation (matching filings_index/company_facts pattern).
+    const newStore: EdgarCacheStore = { cache: { ...s.cache }, etags: { ...s.etags }, lastModified: { ...s.lastModified } };
+    newStore.cache[key] = searchData?.filings ?? [];
+    if (resp?.headers?.etag) newStore.etags[key] = resp.headers.etag;
+    if (resp?.headers?.lastModified) newStore.lastModified[key] = resp.headers.lastModified;
+    writeStore(newStore);
+
     return {
       value: searchData?.filings ?? [],
       ttlClass: 'daily_permanent',