[codex] Add server-side Composio managed auth #826

Job	Run time
build-and-smoke-freebuff-windows	2m 53s
build-freebuff	1m 22s
e2e-ads-behavior	1m 11s
e2e-slash-commands	56s
e2e-help-command	1m 18s
e2e-terminal-command	53s
e2e-version	1m 1s
e2e-startup	1m 10s
e2e-agent-startup	2m 11s
e2e-code-edit	1m 2s
	13m 57s

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