[FEATURE] Enable additional logging for Index Transform

[sarthakaggarwal97]

Is your feature request related to a problem?
This issue is to add logging to understand the processes under the transform job. Currently, there is no visibility to know what phase of the job is being executed and what queries are being made.

There are three phases in which the transform job is currently executed.

1. Search Phase
2. Compute Aggregations
3. Index into Target Index

This issue will get more information around these phases

What solution would you like?
Additional trace logging to have more visibility

[dblock]

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