docs: clarify timeout hierarchy in traffic shaping documentation

[abernix]

Add explanation that router timeout should be >= subgraph timeouts.

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[apollo-librarian]

✅ Docs preview ready

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File Changes

0 new, 3 changed, 0 removed

* graphos/routing/(latest)/observability/client-id-enforcement.mdx
* graphos/routing/(latest)/performance/traffic-shaping.mdx
* graphos/routing/(latest)/errors.mdx

Build ID: 8526b2a0cf1d61e7dbc6b13b
Build Logs: View logs

URL: https://www.apollographql.com/docs/deploy-preview/8526b2a0cf1d61e7dbc6b13b

[fernando-apollo]

Could we say "Default for all subgraphs except the ones below" in the comment? The field name "all" is the one that confused me in the first place.