feat: add public wiki embeds and ES query routing

offline-backend-20260512/backend/docs/CONFIGURATION.md

@@ -270,9 +270,21 @@ skills:
   # Host path (optional, default: ../skills)
   path: /custom/path/to/skills
 
-  # Container mount path (default: /mnt/skills)
-  container_path: /mnt/skills
-```
+  # Container mount path (default: /mnt/skills)
+  container_path: /mnt/skills
+  # Optional system-prompt routing rule for the es_query skill
+  es_query_routing:
+    enabled: true
+    prompt: |
+      当用户的问题需要基于 Elasticsearch Query DSL 灵活构造、调整或执行查询时，优先使用 `es_query` 技能。
+      执行前先读取该技能的 SKILL.md，并严格遵循其中的流程和参数。
+```
+
+`skills.es_query_routing.enabled` controls whether the routing rule is injected
+into the overall agent system prompt. Edit `prompt` to tune the matching boundary
+or invocation requirements. When disabled (the schema default), the block is not
+injected. Custom agents receive it only when their explicit skill allowlist
+contains `es_query`.
 
 **How Skills Work**:
 - Skills are stored in `deer-flow/skills/{public,custom}/`