Locking field-paths for data consistency

**Is your feature request related to a problem? Please describe.**
When doing long queries, data gathered towards the end of the query is no longer consistent with the beginning.

**Describe the solution you'd like**
I'd like to ensure data consistency through some form of argument locking.

**Describe alternatives you've considered**
Not making long queries.

**Additional context**
“Lock” fieldpaths (i.e.: add `"block": {"number": end_block}` and `"where {"_change_block": {"number_gte": start_block}}`
- Basically, locking block ranges so that the data accrued is atomic even if new blocks are indexed come in

**Implementation checklist**
- [ ] Task 1

The issue mentions adding locking field-paths for data consistency in long queries. Look at the GraphQL query handling code in subgrounds, likely in query builders or data fetching modules. Understand how block ranges are currently handled and where to inject locking logic. Check existing tests for query execution to see how to verify atomicity across blocks.

Written by the indexing model from the issue text.