chore: Mount Pipedream + qualification-loop routes in server/index.ts

[VictorGjn]

Context

New route files created but not mounted in the Express server.

Changes needed

1. Import pipedreamRoutes from ./routes/pipedream.js
2. Mount at /api/pipedream
3. Import qualificationLoopRoutes from ./routes/qualification-loop.js
4. Mount at /api/qualification (alongside existing qualification routes)

Depends on: #133 + #137 merge