docs(hostmon): the reader's own doc still denied #1967's fix

[justinchuby]

One doc comment. crates/onnx-runtime-hostmon/src/hostlock.rs, on field_from_env:

Note also that hostlock.sh run does not export --owner, so passing the flag alone leaves a child unable to recognise its own parent's lock; that reports Held, which is unattributed and unprotected, and is the honest answer.

#1967 (8d6377f00) made that false. It is the doc comment on the function that decides mine: versus held:, so the reader it misleads is precisely the one deciding whether a benchmark row can be trusted — and it steers them away from run --owner X, which is now the invocation that works.

Repo-wide grep finds no other copy: #1967 updated scripts/ort_ab/README.md, and this was the only sentence it missed.

The replacement states the asymmetry too, since a reader will otherwise re-derive it: a declared owner (--owner, or HOSTLOCK_OWNER already in the environment) is exported; an owner defaulted from $USER is not, because every agent here is the same unix user and a false mine: reads as protected. A run that declared nothing still reports Held.

How I found it, and what I checked

I had been fixing #1929 in parallel and did not notice #1967 until my branch stopped getting CI (see below). Reviewing that PR against mine, this was the one thing its diff did not cover. I also checked the two adjacent claims in mine that #1967 might have missed, and it had not missed them:

• Its OWNER_DECLARED is initialised in the defaults block, so an inherited environment variable of that name cannot stand in for the flag. My first attempt read ${OWNER_DECLARED:-0} and initialised it nowhere, which let OWNER_DECLARED=1 hostlock.sh run -- child export the $USER default — the exact false mine: the change exists to prevent. fix(hostlock): let run --owner certify the rows it wraps (#1929) #1967 does not have that hole.
• I checked that its guard is test-covered rather than merely present, by deleting the OWNER_DECLARED=0 line on main and running the full suite twice: 4 red in a clean environment (set -u catches the unguarded read), and 1 red with OWNER_DECLARED=1 inherited (an owner defaulted from the unix user is NOT exported). Covered in both directions, so there is nothing for me to add there.

Validation

• RUSTDOCFLAGS="-D warnings" cargo doc -p onnx-runtime-hostmon --no-deps — clean, and the intra-doc link still resolves.
• cargo test -p onnx-runtime-hostmon — green including doctests; cargo fmt --all --check clean.

Unrelated, but worth recording for whoever hits it next

My #1968 sat for forty minutes with no Actions runs at all — not queued, not failed: no GitHub Actions check suite was ever created for the head SHA, while other branches dispatched normally. Close/reopen did not help, and neither did a force-push to a fresh SHA. The cause was that the branch conflicted with main (because #1967 had landed in the same files): GitHub cannot compute the merge ref, so it creates no pull_request runs. A conflicted PR and a backlogged CI queue look identical from gh pr checks, which says "no checks reported" for both. The tell is gh api repos/{o}/{r}/commits/{sha}/check-suites — third-party app suites appear, the github-actions one does not.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.01%. Comparing base (b3a9f6c) to head (53a85d9).
⚠️ Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1981      +/-   ##
==========================================
+ Coverage   80.25%   81.01%   +0.76%     
==========================================
  Files         407      424      +17     
  Lines      188524   207552   +19028     
  Branches   188524   207552   +19028     
==========================================
+ Hits       151293   168152   +16859     
- Misses      31822    33760    +1938     
- Partials     5409     5640     +231     

Flag	Coverage Δ
cli-ort-windows	72.10% <ø> (?)
mlas	85.33% <ø> (?)
offline	81.18% <ø> (+0.93%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
crates/onnx-runtime-hostmon/src/hostlock.rs	92.39% <ø> (-0.09%)	⬇️

... and 65 files with indirect coverage changes

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