ANUGA - Hydrodynamic Modeling Files

Patch release on the 3.3.x line.

Fixes

Structure operators — parallel logging (#182)

• Parallel culvert/weir .log files now include the accumulated_flow column, matching the sequential logs (the value was computed but never written).
• Operator numbering is now unique and rank-consistent (previously only the master proc advanced the counter, which mis-numbered structures when a culvert and a trap had different master procs).
• The _P<rank> suffix is dropped from the log filename so it matches the sequential name (culvert_0.log, trap_1.log); the log is already a single combined, master-written file.

Weir/orifice-trapezoid — critical-depth gravity (#182)

• The trapezoidal critical-depth Newton solve derived gravity from a hardcoded 9.81; it now uses the domain's g (domain.g), so results are correct for non-Earth gravity. This shifts partly-full weir results ~0.034% at the 9.8 default.

SWW output (#149)

• Fixed an IndexError crash when storing a near-duplicate/checkpoint timestep at large simulation time (absolute time-slot tolerance now scales with time).

Build / CI

• Build Intel macOS (osx-64) wheels on the arm64 runner (#142).
• Bump actions/checkout 6 → 7 (#146).

Full changelog: https://github.com/anuga-community/anuga_core/compare/3.3.7...3.3.8