Prisma MCP Server

## Testing `relationMode` datasource property on all databases Internal Notion pages - [Project](https://www.notion.so/prismaio/Referential-Actions-TS-Test-Plan-52571af2aa6a48c1ae3a929880fd25aa) - [Findings](https://www.notion.so/prismaio/Phase-1-Report-on-findings-f21c7bb079c5414296286973fdcd62c2) Note: We are not testing SetNull with `foreignKeys` because it is invalid. SetNull with a non-optional relation errors when the migration DDL is applied for all databases (except for PostgreSQL where it fails at runtime) Related issue to add a validation error: https://github.com/prisma/prisma/issues/14673 How to run these tests? ```sh RELATION_MODE=foreignKeys pnpm run test:functional:code --relation-mode-tests-only RELATION_MODE=prisma pnpm run test:functional:code --relation-mode-tests-only # Or test default (no `relationMode` datasource property, which means using Foreign Keys for SQL databases) pnpm run test:functional:code --relation-mode-tests-only # To only run one test file, for example: pnpm run test:functional:code --relation-mode-tests-only relationMode/tests_1-to-1.ts pnpm run test:functional:code --relation-mode-tests-only relationMode/tests_1-to-n.ts pnpm run test:functional:code --relation-mode-tests-only relationMode/tests_m-to-n.ts pnpm run test:functional:code --relation-mode-tests-only relationMode/tests_m-to-n-MongoDB.ts ``` Some reproductions related to `relationMode`: - [10000](../issues/10000/) - [12378](../issues/12378/) - [12557](../issues/12557/) - [13766](../issues/13766/) - [14271](../issues/14271/)