Add distinct to RouteSelect query in order to avoid duplicate results

[CDimonaco]

When querying for routes, the results are duplicated, we resolved adding Distinct to RouteSelect query.

You can replicate the result with the following graphql query.

  routes(where: {
    agency_ids: [your_agency], near: {
    lat: 43.793224,
    lon: 11.221117,
    radius: 10,
  }}) {
    id
    geometry
    route_long_name
  }

Co-Authored-By: David Costa david@zarel.net

[CDimonaco]

/cc @zarelit @m4ng0

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