[codex] Block Freebuff VPN and proxy traffic #758

Job	Run time
build-freebuff	1m 14s
build-and-smoke-freebuff-windows	2m 41s
e2e-version	1m 9s
e2e-terminal-command	52s
e2e-help-command	1m 7s
e2e-code-edit	57s
e2e-slash-commands	51s
e2e-ads-behavior	1m 16s
e2e-agent-startup	2m 24s
e2e-startup	1m 15s
	13m 46s

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