refactor: take card-state in org-drill-determine-next-interval-sm5

Stage 4 of #147. sm5 now takes (state quality of-matrix &optional delta-days) instead of nine positional args, binding the recall fields from the struct at the top so the algorithm body is unchanged. Both call-site branches pass the state they already hold, dropping the per-branch accessor unpacking.

The testutil adapter test-scheduler--call-sm5 keeps the sm5 test calls a one-symbol rename per site. I also kept the return as the existing list, matching the stage-3 refinement: the goal is reducing the input signature, and changing the return shape would force the shared return-extractors and every return-read to change for no real gain.

Also folds in two stage-3 follow-ons I missed when sm2 landed: a direct sm5 call in tests/test-org-drill-small-branch-coverage.el now uses the new struct API inline, and five direct sm2 calls in the simple-workflow integration test now go through the testutil adapter (the integration file picks up the testutil-scheduler require). Caught by running make test-integration this stage, which I should have run on the sm2 stage.

0 files changed, 0 insertions, 0 deletions