Setting up a data warehouse source Use this skill when the user wants to connect an external data source to PostHog's data warehouse for the first time. The setup has a specific three-step flow (wizard → db-schema → create) — skipping steps leads to failed sources and confused users. When to use this skill - The user wants to connect a new source: "connect Stripe", "import my Postgres orders table", "sync Hubspot contacts" - The user isn't sure what source types PostHog supports - The user has credentials but doesn't know how to structure the payload - The user wants guidance on which sync me…