docs: the Phase 9 drill gap is closed, so stop documenting it as open

[MCKRUZ]

Completes the cross-repo half of claude-code-sdlc#35, which explicitly called for it: "Either way, docs/phase-9-example.md in the standard repo needs correcting to match."

Stacked on #43 — the companion Steps tabs — because the drill-record claims live in both the pre-existing Example tab (on main) and the new Steps tab (only on #43's branch). Merge #43 first; GitHub will retarget.

Depends on claude-code-sdlc#37. Do not merge this before that one, or the standard will describe a step the plugin does not yet ship.

What changed and why

The standard described drill-record.md as optional with nothing producing it — 4 places in docs/phase-9-example.md, 7 in docs/companion/phase-9.html. That was accurate when written. SDLC PR #37 ships Step 4: Alert Drill, an artifact spec, a template, and promotes the artifact to required, so it is now wrong.

Phase 9 also went from seven numbered steps to eight; the example's procedure preamble said seven.

What I deliberately kept

• The gap callout survives as a closed-gap note rather than vanishing. The gap is why the step exists, and Harbor's silent-night bug is the evidence that justified it. Deleting the history would make the step look arbitrary.
• The fatigue-review record is still marked ⚠. It genuinely remains optional with nothing writing it — that claim is still true and was left alone. Only drill-record changed.
• "A green gate is not a finished phase" stands. The gate still cannot tell whether the drill actually happened, or whether the record was written from memory the morning of the gate. Step 4 says to write it as it runs; nothing can enforce that, and the page now says so explicitly rather than implying the step solved it.

Test plan

• Standard test suite: 46 passed
• scripts/check_standard.py: No drift — all 6 checks ok
• Companion page tags balanced (4 <main>, 49 <section>, 295 <div>, each matched)
• Zero remaining "nothing writes it" / "no step runs the drill" / "specified by nothing" claims about the drill
• Human read-through of the two rewritten callouts

🤖 Generated with Claude Code