fix: resolution_date is earlier than created_date

[mindlesscloud]

Summary

Before going any further, let's take a look at an example.

var f struct {
    I int     `json:"i"`
    A *string `json:"a"`
}
blob1 := `{"i": 42, "a": "hello"}`
json.Unmarshal([]byte(blob1), &f)
blob2 := `{"i": 42}`
json.Unmarshal([]byte(blob2), &f)
fmt.Println(*f.A)

The output of this piece of code would be "hello", because the blob2 has no "a" key, the field f.A would keep the value set at the last time.
The ExtractExistRawData function in the GraphqlCollector suffers from the same issue. During each iteration of the loop, the same query object is being populated by a call to json.Unmarshal, causing the previous field values to persist. To fix this issue, we propose creating a new query object during each iteration of the loop.
Here's the relevant code:

query, variables, _ := collector.args.BuildQuery(nil)
for cursor.Next() {
    err = db.Fetch(cursor, row)
    err = errors.Convert(json.Unmarshal(row.Data, &query))
}

Does this close any open issues?

Closes #4988
Closes #4989