Create index for JSON fields

[killme2008]

What type of enhancement is this?

Performance, User experience

What does the enhancement do?

We should support creating an index for context.trace_id and context.span_id in the context column from OpenTelemetry Traces(https://opentelemetry.io/docs/concepts/signals/traces/):

"context": {
    "trace_id": "5b8aa5a2d2c872e8321cf37308d69df2",
    "span_id": "051581bf3cb55c13"
  }

Additionally, enabling the query where context.trace_id = '5b8aa5a2d2c872e8321cf37308d69df2' would allow the index to optimize query performance.

Implementation challenges

No response

[CookiePieWw]

Seems duplicated to #4849? We can close one of them.