apr(completion): project-level completion evaluation — replace the loadAprIdeaCompletion stub body

[JSONbored]

Problem

loadAprIdeaCompletion is a fail-closed stub. It needs a real evaluation that decides
whether an idea's approved criteria are satisfied.

Scope

• Evaluate each blocking criterion: mechanical assertions run and are checked directly;
  judgment criteria are evaluated by the same review machinery the gate uses at PR level,
  against the criterion text
• Completion requires all blocking criteria satisfied AND the mapped issues closed —
  neither alone is sufficient (closed issues that don't satisfy their criterion must not
  complete a project, and satisfied assertions with open blocking work must not either)
• Evaluate the assembled repository state, not the sum of individual PRs: twenty PRs that
  each passed their own gate can still not integrate. At minimum, the project's own test
  suite and build must pass on the default branch at evaluation time
• Write a completion verdict record with per-criterion results and the evaluated commit
  sha, so a delivery decision is auditable after the fact
• Replace the body, keep the signature — every existing caller must pick it up unchanged

Acceptance

loadAprIdeaCompletion returns a real verdict backed by a persisted record; a project with
an unsatisfied blocking criterion never reports complete; the verdict names the commit it
was evaluated against.

Out of scope

Anti-gaming hardening of criteria (follow-up), and the transfer/delivery action itself.

[linear-code]

JSO-7081