chore(staging): bump images + add mpabi.pl host

- Switch custom images to gitea.mpabi.pl registry (rv32i.pl TLS no longer matches).
- Bump frontend to sha-a12c86f.
- Add staging ingress for mpabi.pl pointing to trade-frontend.

kustomize/base/api/deployment.yaml

@@ -16,7 +16,7 @@ spec:
         - name: gitea-registry
       containers:
         - name: api
-          image: rv32i.pl/trade/trade-api:k3s-20260106013603
+          image: gitea.mpabi.pl/trade/trade-api:k3s-20260106013603
           imagePullPolicy: IfNotPresent
           ports:
             - name: http

kustomize/base/frontend/deployment.yaml

@@ -16,7 +16,7 @@ spec:
         - name: gitea-registry
       containers:
         - name: frontend
-          image: rv32i.pl/trade/trade-frontend:sha-6107c4e
+          image: gitea.mpabi.pl/trade/trade-frontend:sha-a12c86f
           imagePullPolicy: IfNotPresent
           ports:
             - name: http

kustomize/base/ingestor/deployment.yaml

@@ -16,7 +16,7 @@ spec:
         - name: gitea-registry
       containers:
         - name: ingestor
-          image: rv32i.pl/trade/trade-ingestor:k3s-20260106013603
+          image: gitea.mpabi.pl/trade/trade-ingestor:k3s-20260106013603
           imagePullPolicy: IfNotPresent
           env:
             - name: MARKET_NAME

kustomize/overlays/staging/frontend-ingress-root.yaml

@@ -0,0 +1,24 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: trade-frontend-root
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-prod
+    traefik.ingress.kubernetes.io/router.entrypoints: websecure
+spec:
+  ingressClassName: traefik
+  tls:
+    - hosts:
+        - mpabi.pl
+      secretName: mpabi-pl-tls
+  rules:
+    - host: mpabi.pl
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: trade-frontend
+                port:
+                  number: 8081

kustomize/overlays/staging/kustomization.yaml

@@ -7,6 +7,7 @@ resources:
   - ../../base
   - pgadmin.yaml
   - frontend-ingress.yaml
+  - frontend-ingress-root.yaml
 
 patchesStrategicMerge:
   - hasura-patch.yaml