sol v1.1.0: SearXNG web search, evaluator redesign, research agents

- SearXNG deployment in data namespace (free, no-tracking web search)
- sol-config: SearXNG URL, research config, identity agent, updated
  system prompt (DM search rules, research mode, silence, hard rules)
- sol-deployment: debug logging (RUST_LOG=sol=debug), full image path
- opensearch: tolerate missing prometheus-exporter plugin on OS 3

base/data/opensearch-deployment.yaml

@@ -24,6 +24,8 @@ spec:
       containers:
         - name: opensearch
           image: opensearchproject/opensearch:3
+          command: ["sh", "-c"]
+          args: ["opensearch-plugin install --batch prometheus-exporter || true; /usr/share/opensearch/opensearch-docker-entrypoint.sh"]
           ports:
             - name: http
               containerPort: 9200