feat: llm model overrides #1856

Job	Run time
discover-testcases	5s
debug-breakpoints / cloud	39s
chat-models / cloud	1m 25s
company-research-agent / cloud	1m 20s
debug-breakpoints / alpha	39s
company-research-agent / staging	1m 22s
simple-local-mcp / cloud	45s
dev-console / staging	2m 20s
chat-models / staging	1m 28s
simple-local-mcp / alpha	51s
dev-console / alpha	2m 23s
init-flow / cloud	55s
company-research-agent / alpha	1m 25s
simple-local-mcp / staging	49s
dev-console / cloud	2m 23s
init-flow / staging	55s
chat-models / alpha	1m 37s
init-flow / alpha	57s
ticket-classification / cloud	52s
ticket-classification / alpha	51s
debug-breakpoints / staging	41s
ticket-classification / staging	54s
	25m 36s

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