Deploy searxng ai-summary-20260805 (LLM server API key support)

New multi-arch image (amd64+arm64) built from searxng fork ce400f993:
the ai_summary plugin can now authenticate to the LLM server with an
ai_summary.api_key, sent only to the configured base_url.

secret.example.yaml documents the ai_summary block, including the new
optional api_key.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/searxng/deployment.yaml

@@ -35,7 +35,7 @@ spec:
     spec:
       containers:
         - name: searxng-1723974683
-          image: gt.wittyoneoff.com/jason/searxng:ai-summary-20260728-3
+          image: gt.wittyoneoff.com/jason/searxng:ai-summary-20260805
           imagePullPolicy: Always
           env:
             - name: AUTOCOMPLETE