[publication] Add submitted publishing status

[Montekkundan]

Brief summary of changes

• Adds Submitted as a publication publishing status alongside In Progress and Published.
• Updates the publication proposal form and publication list filter to expose all three statuses.
• Adds the database schema update and upgrade patch while preserving existing status values.
• Adds translation entries and manual testing instructions for the publishing statuses.

Testing instructions

• Apply SQL/New_patches/2026-08-26-add-publication-submitted-status.sql.
• Open /publication/ as a user with publication proposal access.
• Open Propose a Project and confirm Publishing Status offers In Progress, Submitted, and Published.
• Save a proposal with each status and confirm the selected value appears in the publication table.
• Reopen the proposal and confirm the selected publishing status persists.
• Filter the publication table by Submitted and confirm only submitted proposals appear.

Link(s) to related issue(s)

• Resolves [Publication] Add Submitted and In Progress options for publishing status #11141