Namespace all column references in ProjectQuery to fix ambiguity with Ferret constraints

Summary:
Fixes T13378. If we join Ferret tables and page, we can end up with an ambiguous id column here.

Explicitly refer to "project.x" in all cases that we're interacting with the project table.

Test Plan:

• Changed page size to 3.
• Issued a Projects query for "~e", matching more than 3 results.
• Clicked "Next Page".
  • Before: ambiguous id column fatal.
  • After: next page.

Maniphest Tasks: T13378

Differential Revision: https://secure.phabricator.com/D20714