Module execute_range_sum 

Range execution paths for the sum query. Parallels count’s execute_range_count.rs.

• DriveDocumentSumQuery::execute_range_sum_no_proof — Rust-side walk via query_aggregate_sum (or per-In fan-out for compound shapes), returning a single Aggregate entry or per-(in_key, key) distinct entries without a proof.
• DriveDocumentSumQuery::execute_aggregate_sum_with_proof — grovedb AggregateSumOnRange proof, returning a single i64 verified out of the proof.
• DriveDocumentSumQuery::execute_distinct_sum_with_proof — regular range proof against the ProvableSumTree, returning per-key KVSum ops bound to the merk root.