Repair two pastes in the operator guide that no longer reproduce (#42)

[iderex]

Refs #42

What this changes

Two quotations in the exit-code section of docs/operator-guide.md. Both are
pastes of what a command printed, and neither of them reproduced any more.

The first is where exit code 3 is declared. The page pasted a git grep -n
line naming internal/hardware/hardware.go:45, and the constant sits on line
54 today. It moved when b3ba466 held the three exit-code declarations to one
contract, which changed nothing that the sentence around the paste claims, so
the quotation went stale while the claim above it stayed true. The command
loses its -n, so the paste names the file and the declaration rather than a
line that an unrelated edit moves.

The second is ./lab frobnicate. The runner prints the unknown-verb line and
then the help text, on the same stream, and the page pasted the first line
only. It now says the help text follows. The help text itself stays out of the
page, because a copy of it here drifts against the runner that prints it, and
the entry beside it in the same block already describes it rather than pasting
it.

What failure it prevents

Somebody checking the page against the runner finds a paste that disagrees with
what the command gives them, and nothing on the page separates that from the
page being wrong about the thing it is explaining. The first of the two had
already reached that state. The second was a line short of the output from the
day it was written.

What was run

At f11384c, from a checkout of this branch.

git grep -n 'ExitAskedAndDeliveredNothing = ' origin/main -- internal/hardware
origin/main:internal/hardware/hardware.go:54:const ExitAskedAndDeliveredNothing = 3

git log --oneline -1 origin/main -- internal/hardware/hardware.go
b3ba466 Hold the three exit-code declarations to one contract (#125)

go build -o lab ./cmd/lab
./lab frobnicate 2>&1 1>/dev/null
lab: unknown verb "frobnicate"

lab reads this repository and reports what it examined.

    lab check [path]   walk the tree at path, default ".", and report
    lab list [path]    list the experiments at path, default ".", oldest
                       unanswered first
    lab help           print this text

lab writes nothing to the tree it reads.

go build ./cmd/... ./internal/...
go vet ./cmd/... ./internal/...
gofmt -l cmd internal
(no output from any of the three)

go test -count=1 -v ./cmd/... ./internal/... 2>&1 | grep -cE '^--- PASS'
119
go test -count=1 -v ./cmd/... ./internal/... 2>&1 | grep -cE '^--- (FAIL|SKIP)'
0

go run ./cmd/lab check .
examined .
1 experiment directory walked, 1 record read
18 decision records read
the time this run read is 2026-08-17T17:24:43Z
0 refused

The integration-hardware harness was not asked for and nothing in it ran, which
is what the suite's own disclosure line says about that run.

What this does not do

It does not finish #42. What is open there is the download and the checksum
paragraphs, and those need something published to download.

That sentence used to be spelled with the word this platform reads as a closing
keyword, followed by the reference, and the merge shut the issue on it. The
issue is open again and its done-condition did not move. The negation is
invisible to whatever parses the body, so the word is gone from it rather than
qualified.

It does not sweep the rest of the tree. The same class is live one document
over: docs/supply-chain.md cites .github/workflows/zizmor.yml:63 and
:82, and both of those lines are now :72 and :91. That file is outside
what this change is about and nothing here touches it.

It reads two quotations rather than every claim on the page. The counts in the
first-run and listing sections were re-derived and still hold at the commit
they name, and the three exit-2 routes were re-run and all three do print to
standard error, but nothing here re-argues what the page says.

This change has had no second reader.