Stock Ageing iterates stock ledger entries through an unbuffered
(streaming) cursor. _get_batchwise_valuation() lazily queried
Batch.use_batchwise_valuation from inside that loop whenever a row
carried the legacy batch_no field, and the nested query invalidated
the active streaming result set — crashing the report (or silently
dropping the remaining rows, depending on the driver version).
Resolve the valuation flags in a single query before entering the
unbuffered cursor block; the lazy lookup now only serves callers that
pass stock ledger entries in directly, where no streaming is active.
Fixes https://github.com/frappe/erpnext/issues/55786
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
(cherry picked from commit 060a5c4eeb)
c6176500d2