homepage: auto-promote advertiser stories + premium slots in Industry News

Three-tier sort on the Industry News feed:
1. Premium — articles pinned via adv.featured_story_slots (paid slots).
   Sorted by position ascending. Highlighted with an amber left-border
   gradient + ★ Featured ribbon.
2. Advertiser — articles whose title contains the company name of a
   current active banner advertiser on this property, AND were published
   in the last 48 hours. Highlighted with a blue left-border gradient
   + ◆ Advertiser ribbon. Multiple matches ordered by publish date.
3. General — everything else, newest first.

After 48h, advertiser stories naturally drop back into the general
tier. Premium slots fall off when their ends_at passes.

Detection is title-only with case-insensitive word-boundary match; the
longest matching company name wins so "Sony Pictures" beats "Sony"
when both advertise. Backed by the new adv.active_advertisers_by_
property view.

createAdminClient() now accepts an optional schema arg so we can hit
adv from BB without juggling clients.

API revalidate dropped 300 → 60s so the feed reflects campaign flips
within a minute.

src/app/api/public/posts/route.ts

@@ -1,11 +1,11 @@
 import { NextResponse } from "next/server";
 import { getLatestImportedArticles } from "@/lib/articles/legacy-source";
+import { decorateHomepageFeed } from "@/lib/promoted-articles";
 
-export const revalidate = 300;
+// Lowered from 300 → 60 so the promoted-story sort reflects current
+// advertiser state within a minute of a campaign flip.
+export const revalidate = 60;
 
-// Homepage feed now renders every imported post; pagination + infinite-
-// scroll happen client-side over the full set. Keep an absolute ceiling
-// only as a safety valve, not a UX cap.
 const MAX_LIMIT = 10000;
 const DEFAULT_LIMIT = 100;
 
@@ -20,7 +20,7 @@ export async function GET(request: Request) {
 
   const { items, total } = await getLatestImportedArticles(limit, offset);
 
-  const payload = items.map((a) => ({
+  const base = items.map((a) => ({
     title: a.title,
     excerpt: a.excerpt,
     category: a.category,
@@ -33,6 +33,16 @@ export async function GET(request: Request) {
     source: "imported" as const,
   }));
 
+  // Decorate + reorder so premium and current-advertiser stories surface
+  // at the top of the feed.
+  const decorated = await decorateHomepageFeed("broadcastbeat", base);
+  const payload = decorated.map((d) => ({
+    ...d.article,
+    promoted_kind: d.promoted_kind,
+    promoted_advertiser: d.promoted_advertiser || null,
+    promoted_until: d.promoted_until || null,
+  }));
+
   return NextResponse.json(
     {
       items: payload,
@@ -43,7 +53,7 @@ export async function GET(request: Request) {
     },
     {
       headers: {
-        "Cache-Control": "public, s-maxage=300, stale-while-revalidate=600",
+        "Cache-Control": "public, s-maxage=60, stale-while-revalidate=120",
       },
     },
   );