The storage can be passed as l-value or r-value. The solution itself is still mutable.

[multidomain][couplingmanager] Remove unused implementation detail

See merge request !3875

This was forgotten in the cleanup for dumux 3.6 where it had been used for deprecating an interface.

[io][subgrid][yasp] Get all params when initializing

See merge request !3873

Fix/fcstaggered parallel

See merge request !3858

[readme] Update latest release pipeline to 3.9

See merge request !3871

[common] Add option for five-point stencil numeric difference

See merge request !3866

Move Changelog entry to correct release cycle

See merge request !3863

[gitignore] Ignore more Python-related clutter

See merge request !3859

[linear] Adapt istl solver factories to OperatorTraits

See merge request !3857

Fix .mailmap tk

See merge request !3855

[test][md][boundary][stokesdarcy][1p2c] remove double include

See merge request !3856

[cleanup] Remove unused variables flux

See merge request !3854

Found by Clang 18.

Feature/doc disc images

See merge request !3850

[doc] Fix images for cctpfa/ccmpfa documentation.

See merge request !3846

[stokes_solver] Fix mass matrix for linear CVFE and allow direct solver for P

See merge request !3847

[stokes_solver] Allow using direct solver for pressure block and increase default jacobi iterations when pressure operator is not diagonal

[doc][doxygen][img] cleanup tpfa and mpfa figures

See merge request !3845