fix: lower nginx catch-all ingressroute priority to restore /api routing

The nginx catch-all rule (priority 10000) was winning over the api
IngressRoute (priority 100), so /api/* requests (except the explicit
/api/auth and /api/monitoring overrides) were being routed to the
Next.js app and returning 404. Drop the catch-all priority to 50 so
the api route wins while keeping the nginx-specific overrides.

Author: Viczei

.kontinuous/env/prod/archive/http.yaml

@@ -108,7 +108,7 @@ spec:
     match: Host(`egapro.travail.gouv.fr`)
     middlewares:
     - name: security-headers-nginx
-    priority: 10000
+    priority: 50
     services:
     - name: nginx
       port: 80