fix: Raise matrixRTC authorisation service memory limit (20Mi -> 128Mi)

Chart default of 20Mi request+limit OOM-killed the service today after
~74 days of uptime (3rd OOM over its lifetime), causing intermittent
call setup failures unrelated to the NetworkPolicy work happening in
parallel. 20Mi is razor-thin for a long-running Go service; bumping to
a still-modest 64Mi/128Mi request/limit.

apps/production/element-server-suite.yaml

@@ -59,6 +59,14 @@ spec:
       enabled: true
       ingress:
         host: mrtc.axion1337.chat
+      # Chart default (20Mi request+limit) OOM-killed the authorisation service after
+      # ~74 days of uptime (2026-07-28) - too tight for a long-running Go service.
+      resources:
+        requests:
+          memory: 64Mi
+          cpu: 50m
+        limits:
+          memory: 128Mi
 
     # Element Web
     elementWeb: