Introspect an existing database and generate/refresh a Prisma schema from it using prisma db pull, then produce a working Prisma Client from the introspected schema.

Documented steps

1. Set prisma.config.ts datasource.url to the database you want to introspect (env("DATABASE_URL")).
2. Ensure prisma/schema.prisma at minimum has a `generator client { provider = "prisma-client" }` block and a `datasource db { provider = "<your-db>" }` block matching the real database type — db pull needs the provider to know how to read the database.
3. Back up or commit the current prisma/schema.prisma first — db pull overwrites it and can discard manual customizations.
4. Run `npx prisma db pull` to introspect and overwrite prisma/schema.prisma with models reflecting the live database. Use `npx prisma db pull --print` to preview the generated schema on stdout instead of writing it, or `--force` to discard any manual edits and regenerate purely from the introspected structure.
5. Run `npx prisma generate` to build Prisma Client from the newly introspected schema.
6. If you're introducing Prisma Migrate to this existing database afterward, don't just start running migrate dev — follow the baselining workflow (migrate diff + migrate resolve --applied) so Prisma doesn't try to recreate tables that already exist.
7. Reference: https://www.prisma.io/docs/cli/db/pull, https://www.prisma.io/docs/orm/reference/prisma-cli-reference