fix(knowledge): keep mcp key env on new token secret

apps/knowledge/knowledge.yaml

@@ -144,6 +144,11 @@ spec:
             # workstation GPU when present.
             - name: FlowerCore__Ollama__BaseUrl
               value: "http://10.0.57.17:11434"
+            - name: FlowerCore__Mcp__ApiKey__Key
+              valueFrom:
+                secretKeyRef:
+                  name: knowledge-mcp-tokens
+                  key: password
             - name: FlowerCore__Mcp__ApiKey__HeaderName
               value: "Authorization"
             - name: KNOWLEDGE_MCP_BEARER_TOKEN