Returns the resolved configuration for one brand, or 404 when that brand has no row. 404 means "never switched on" and is not an error condition; a brand that was explicitly switched off returns 200 with `enabled: false`. Keeping those two distinguishable is why no defaults DTO is fabricated here.

Read DTO for the gen-ai interactive support agent configuration. Returned by both the admin endpoint (/v1/admin/genai/config) and the internal endpoint (/api/genai/config).

Every tuning field here is the EFFECTIVE value, already resolved server-side: the brand's own override, else the brand's copilot row, else the platform default. A consumer never has to know the layering existed, and never has to look anything up of its own.

There is no defaults DTO: a brand with no row yields no DTO at all. That is the deliberate divergence from Infoset.Types.Models.Admin.CopilotConfigDto, whose service fabricates one when nothing is persisted — here, "never configured" must stay distinguishable from "configured and off".