feat(staging): add candles cache + v2 slippage

kustomize/base/api/deployment.yaml

@@ -18,6 +18,9 @@ spec:
         - name: trade-api-wrapper
           configMap:
             name: trade-api-wrapper
+        - name: trade-api-upstream
+          configMap:
+            name: trade-api-upstream
       containers:
         - name: api
           image: gitea.mpabi.pl/trade/trade-api:k3s-20260111095435
@@ -31,6 +34,10 @@ spec:
               mountPath: /override/wrapper.mjs
               subPath: wrapper.mjs
               readOnly: true
+            - name: trade-api-upstream
+              mountPath: /app/services/api/server.mjs
+              subPath: server.mjs
+              readOnly: true
           env:
             - name: PORT
               value: "8787"