Search and retrieve both posted and pending transactions for a source (reservation, group profile, or house account), merged into a single response. This endpoint uses POST (instead of GET) to support complex filter and grouping criteria in the request body. Results can be grouped by date, transaction type, folio, or other fields.

Results are always wrapped in groups. When groupBy is specified, transactions are grouped by that field. When omitted, all transactions are placed in a single group with key "default". Pagination is applied first (cursor-based on flat transactions), then grouping is applied to the page results. Groups at page boundaries may be partial.

When includeTotal is true, totals and foreign currency totals are computed on the first page and cached in Redis. Subsequent pages return cached totals. When no filters are applied, the total amount is read from the pre-computed source balance for optimal performance.

Supported filter fields: folioId, posted, descriptionFilters, transactionDate range, serviceDate range, subSourceIds, searchQuery.

Supported sort fields: transaction_datetime, service_date, id, internal_code.

Supported groupBy fields: transaction_date, service_date, internal_code_group, description, sub_source_identifier, folio_id, user_id.