feat: /openapi-chatgpt.json — 29-op spec for ChatGPT Custom GPT limit

Drops obsidian (5 ops) and whatsapp/templates list (1 op) to stay
under ChatGPT's 30-operation cap. Served at /openapi-chatgpt.json.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

hermes-k8s.yaml

@@ -22,7 +22,7 @@ spec:
         fsGroup: 1000
       containers:
         - name: hermes-mcp
-          image: localhost:32000/hermes-mcp@sha256:4f91bf92c5498605a59d54b1a32789e9d125fcff0c0b1d00225fc2bae888f26d
+          image: localhost:32000/hermes-mcp@sha256:d98ef6d2fde25c11233f614f839b09958bfb772c9a5b26fe8374cf6ffd5417a2
           imagePullPolicy: Always
           securityContext:
             allowPrivilegeEscalation: false