improvements to max child records

### Problem

The current max child records of 50 is too low for relatively simple transactions such as the following:

https://hashscan.io/mainnet/transaction/1706486346.577555003

NOTE: many of the calls in the above tx are for view/read interactions with the HTS system contract.

### Solution

Either:

1. increase the limit or
2. don't count any read only interactions with the HTS system contract(either directly or via the IHRC facade) as a child transaction/record

### Alternatives

_No response_

Start by examining how child records are counted for the referenced transaction, especially calls to the HTS system contract and the IHRC facade. Determine whether the intended resolution is a higher limit or excluding read-only interactions, and consider the referenced transaction the completion case.

Written by the indexing model from the issue text.