perf(api-server): tune gallery load shedding

deploy/container/docker-compose.loadtest.yml

@@ -3,6 +3,7 @@ name: genarrative-container-loadtest
 services:
   spacetimedb:
     image: clockworklabs/spacetime:v2.2.0
+    user: root
     command:
       [
         "start",
@@ -11,11 +12,11 @@ services:
         "--data-dir",
         "/var/lib/spacetimedb",
         "--page_pool_max_size",
-        "536870912",
+        "402653184",
         "--non-interactive",
       ]
     cpus: "1.0"
-    mem_limit: 768m
+    mem_limit: 896m
     ports:
       - "${GENARRATIVE_CONTAINER_SPACETIME_PORT:-13101}:3101"
     volumes:
@@ -73,7 +74,7 @@ services:
       context: ../..
       dockerfile: deploy/container/api-server.Dockerfile
       target: nginx-runtime
-    cpus: "0.25"
+    cpus: "0.5"
     mem_limit: 128m
     depends_on:
       api-server:
@@ -111,7 +112,7 @@ services:
   k6:
     image: grafana/k6:0.52.0
     profiles: ["loadtest"]
-    cpus: "0.5"
+    cpus: "1.0"
     mem_limit: 512m
     depends_on:
       nginx: