gnucash stable: Multiple changes pushed

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/c3a74e6a (commit)
	 via  https://github.com/Gnucash/gnucash/commit/6070bac8 (commit)
	from  https://github.com/Gnucash/gnucash/commit/b6e4672a (commit)



commit c3a74e6a80186b4bdbba7d5a37879f2a757c22cc
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Sun Jun 28 11:08:41 2026 +0800

    [investment-lots] use faster gnc-account-foreach-split-between-dates
    
    to generate list of splits

commit 6070bac87b39172f2e3911fbd72a9273c03daa10
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Sun Jun 28 00:52:59 2026 +0800

    [report-utilities.scm] convert account value accumulator to c++



Summary of changes:
 bindings/engine.i                                  | 29 ++++++++++++++++++
 gnucash/report/report-utilities.scm                | 35 +++++-----------------
 .../report/reports/standard/investment-lots.scm    | 23 ++++++--------
 3 files changed, 45 insertions(+), 42 deletions(-)