[Bug]: projectService failed to find referenced tsconfigs for typical monorepo setup

[swwind]

Details

There is a mismatched behavior of the projectService configuration option between rslint and eslint.

In a monorepo setup where the root tsconfig.json only contains references pointing to package-specific config files, rslint (configured with projectService: true) fails to find the corresponding tsconfig.json for the TypeScript file, causing type-aware rules to be silently skipped.

In contrast, eslint (configured with projectService: true) successfully follows the references, locates the correct tsconfig.json for the file, and runs type-aware checks correctly.

For more details on the setup and comparison, see #1225.

Reproduce link

https://github.com/swwind/rslint-reference-repro

Reproduce Steps

1. Clone the repro repository: https://github.com/swwind/rslint-reference-repro
2. Run rslint with the configuration in rslint3.config.ts (which has parserOptions: { projectService: true }):

   pnpm exec rslint --config rslint3.config.ts .

   Observe that it only reports the no-console error but silently skips the @typescript-eslint/no-floating-promises error on index.ts (reports 1 error instead of 2).
3. Run eslint with the configuration in eslint4.config.ts (which also has parserOptions: { projectService: true }):

   pnpm exec eslint -c eslint4.config.ts .

   Observe that it successfully reports 2 errors (both no-console and @typescript-eslint/no-floating-promises).