fix: added missing favorite and times_cooked keys to allowed sort ord…

[Abhijay-29r]

Description

This PR fixes a breaking regression where sorting recipes by favorite, -favorite, or times_cooked results in a 500 ValueError: Invalid sort key error.

Changes Made

• Added 'favorite' and '-favorite' to ALLOWED_KEYS inside _finalize_ordering.
• Added 'times_cooked' to _NULLS_LAST to properly manage blank values.
• Added the missing .with_times_cooked(user, space) annotation logic inside get_queryset so the database properly recognizes the field when ordering.

Closes #4720

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