fix: set default to 1 day for assimilation period for MOM6

[hkershaw-brown]

Description:

Sets default to 1 day for assimilation period for MOM6
Also input.nml in work directory to match default

Fixes issue

fixes #1029

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Documentation changes needed?

• My change requires a change to the documentation.
  • I have updated the documentation accordingly.

The documentation lists 1 day in the example input.nml
assimilation_period_days = 1
assimilation_period_seconds = 0

Tests

MOM6 filter run.

Checklist for merging

• Updated changelog entry
• Documentation updated
• Update conf.py

Checklist for release

• Merge into main
• Create release from the main branch with appropriate tag
• Delete feature-branch

Testing Datasets

• Dataset needed for testing available upon request
• Dataset download instructions included
• No dataset needed

[mgharamti]

Looks good. I never noticed these defaults!

[hkershaw-brown]

me neither!

…

On Tue, Jan 6, 2026 at 2:44 PM Moha Gharamti ***@***.***> wrote: ***@***.**** approved this pull request. Looks good. I never noticed these defaults! — Reply to this email directly, view it on GitHub <#1032 (review)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEY6JH5RZ3LUONGI6XCHGVT4FQGDPAVCNFSM6AAAAACQ3W6NOOVHI2DSMVQWIX3LMV43YUDVNRWFEZLROVSXG5CSMV3GSZLXHMZTMMZSGI2DQNZTGQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>