[WIKI-769] chore: add sort order for project page

[NarayanBavisetti]

Description

added sorting of page in project level pages.

Type of Change

• [X] Improvement (change that would cause existing functionality to not work as expected)

Summary by CodeRabbit

• New Features

  • Per-project page sorting: pages now have a numeric sort order assigned on creation and adjusted when access changes to keep ordering consistent within projects.
  • Dummy data generation now assigns deterministic sort values so seeded pages preserve expected order.

• Chores

  • Data migration added to backfill sort order values for existing project pages.

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