fix: exclude /brands path and add PLP brands sampling to unlighthouse config (bigcommerce#2983)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jorgemoya

unlighthouse.config.ts

@@ -26,12 +26,16 @@ export default {
       "/early-access/*/*",
       "/digital-test-product/",
       "/blog/\\?tag=*",
+      "/brands/",
     ],
     customSampling: {
       "/smith-journal-13/|/dustpan-brush/|/utility-caddy/|/canvas-laundry-cart/|/laundry-detergent/|/tiered-wire-basket/|/oak-cheese-grater/|/1-l-le-parfait-jar/|/chemex-coffeemaker-3-cup/|/sample-able-brewing-system/|/orbit-terrarium-small/|/orbit-terrarium-large/|/fog-linen-chambray-towel-beige-stripe/|/zz-plant/":
         { name: "PDP" },
       "/shop-all/|/bath/|/garden/|/kitchen/|/publications/|/early-access/": {
-        name: "PLP",
+        name: "PLP categories",
+      },
+      "/brands/sagaform/|/brands/ofs/|/brands/common-good/": {
+        name: "PLP brands",
       },
     },
     // Disable throttling to avoid issues with cold start and cold cache.