Allow filtering availableFounders by slug

[IvanIvanoff]

Changes

Allow filter availableFounders by slug

{
  getMetric(metric: "social_volume_total") {
    metadata {
      availableFounders(slug: "ethereum") {
        name
      }
    }
  }
}

Allow aggregated_timeseries_data for more social metrics

{
  getMetric(metric: "sentiment_positive_total") {
    aggregatedTimeseriesData(
      selector: {founders: ["satoshi nakamoto"]}
      from:"utc_now-40d"
      to: "utc_now") 
  }
}

Now providing a different aggregation also has effect. Before the aggregatedTimeseriesData used to ignore the provided aggregation and was using a hardcoded one instead.

Ticket

Checklist:

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have tried to find clearer solution before commenting hard-to-understand parts of code
• I have added tests that prove my fix is effective or that my feature works