test(ci): shrink workspace fixtures and move slow tests to nightly

[azimafroozeh]

What & why

Large fixtures and real deadline waits dominate workspace test time. Shrink the catalog, engine and CLI fixtures, split independent matrices for concurrent execution, and move 11 deadline and live-apply journeys to nightly alongside the two existing scale repros.

The ordinary property tests use 12 cases; nightly restores 48. Production deadlines stay unchanged. Scoped workers finish before fixture cleanup, cancellation tests reject successful exits, and executable warmups run after CI builds the debug binaries.

Backing issue / RFC

TODO: link the accepted issue or RFC before submitting.

Checklist

• One logical change: reduce the ordinary workspace test cost.
• Test assertions and matrix coverage retained; nightly owners checked by name.
• CI ownership documented.
• Maintainer verification of the supervisor test override, schema-gate observation seam and CI enrollment changes.

Local verification

• cargo nextest run --workspace --exclude omnigraph-gqt --exclude omnigraph-gqt-served --exclude omnigraph-dst --locked --features omnigraph-engine/failpoints,omnigraph-cluster/failpoints --profile ci --test-threads 4 --no-fail-fast --status-level fail --final-status-level fail: 4,207 passed, 28 skipped.
• All 13 enrolled nightly tests passed locally; their owner check passed. All three property tests passed with PROPTEST_CASES=48.
• cargo fmt --all --check: passed.
• cargo clippy --workspace --all-targets --locked -q --message-format=short -- -D warnings -W clippy::dbg_macro: passed.
• cargo clippy --workspace --all-targets --locked --features omnigraph-engine/failpoints,omnigraph-cluster/failpoints -q --message-format=short -- -D warnings -W clippy::dbg_macro: passed.
• CI guard self-tests and documentation checks passed. Clean library-only nextest probes passed for debug and release with a custom target directory.

Notes for reviewers

The schema-gate observation replaces a timing assumption; the supervisor cutoff override is test-only. Genuine released-binary upgrade journeys self-skipped locally because their binaries were unset. Hosted CI and its timing have not been measured for this tree.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	⚠️ Failed 2026-10-10T17:20:04.889913Z	6933e08	PR opened

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review" or "@codex security review".

Codex reacts with 👀 while any review is running, comments if it has suggestions, and reacts with 👍 once all reviews finish with no findings.