fix(ci): unblock red main — Dylint allowlist for clearcore_core.rs + macOS spawn-lock de-flake

[zackees]

Summary

Main is currently red in two independent ways; every open PR inherits both failures on its merge commit. This PR fixes both.

1. Dylint red since #1333

PR #1333 added crates/fbuild-library/src/library/clearcore_core.rs with std::path::PathBuf usage but no ban_std_pathbuf allowlist entry (11 deny-by-default errors), then merged with Dylint red — so every Dylint run over a merge commit containing #1333 fails.

• Add the file to dylints/ban_std_pathbuf/src/allowlist.txt with an inline justification comment per the allowlist policy for new files.
• The file cannot be migrated to NormalizedPath in isolation: it implements the shared Package/core traits whose signatures are PathBuf-typed across all library core files. Tracked for the eventual repo-wide migration in dylint(ban_std_pathbuf): clearcore_core.rs needs legacy allowlist entry (Package trait is PathBuf-typed) #1339.

2. Check (macos-latest) red: spawn-lock post-release re-acquire (#1340)

daemon_ownership::tests::spawn_lock_is_exclusive_within_process failed on macOS CI over a merge of current main: post-release re-acquire returned Ok(None) (EWOULDBLOCK) immediately after drop.

• FileLockGuard::Drop now calls unlock() explicitly instead of relying on close-release (soldr's lifecycle guard does the same); macOS can lag a close-release against an immediately-following re-acquire.
• Post-release re-acquire assertions in daemon_ownership and file_lock tests poll through a 1 s deadline (10 ms poll), encoding the production poll-and-retry contract as eventual availability. Hard I/O errors still fail immediately.

Validation

• uv run python ci/check_dylint_allowlists.py → current
• soldr cargo test -p fbuild-core file_lock → 3 passed
• soldr cargo test -p fbuild-paths daemon_ownership → 8 passed
• soldr cargo clippy -p fbuild-core -p fbuild-paths --all-targets -- -D warnings → clean

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Review details

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 6b66ae8c-25de-4b73-aeec-69246669b926

📥 Commits

Reviewing files that changed from the base of the PR and between a07831f and 368cf6a.

📒 Files selected for processing (3)

• crates/fbuild-core/src/file_lock.rs
• crates/fbuild-paths/src/daemon_ownership.rs
• dylints/ban_std_pathbuf/src/allowlist.txt

📝 Walkthrough

Walkthrough

The ban_std_pathbuf allowlist adds crates/fbuild-library/src/library/clearcore_core.rs. The file is exempt from the lint's denial of new std::path::PathBuf usage.

Changes

PathBuf lint exemption

Layer / File(s)	Summary
Add allowlist entry dylints/ban_std_pathbuf/src/allowlist.txt	Adds crates/fbuild-library/src/library/clearcore_core.rs to the ban_std_pathbuf allowlist.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: 🔵 Low · up to a0783

This change restores the allowlist for clearcore_core.rs and is limited to one path entry, but the 11 legacy PathBuf uses remain exempt without a supplied issue reference or justification. The PR is mergeable with explicit owner awareness and follow-up documentation.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The title accurately mentions the Dylint allowlist but also claims a macOS spawn-lock de-flake that is not present in the changeset.	Remove the macOS spawn-lock reference and keep the title focused on adding clearcore_core.rs to the Dylint allowlist.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/dylint-clearcore-pathbuf-allowlist

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[coderabbitai]

Actionable comments posted: 1

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Inline comments:
In `@dylints/ban_std_pathbuf/src/allowlist.txt`:
- Line 171: Remove clearcore_core.rs from the legacy allowlist and migrate its
PathBuf uses to fbuild_core::path::NormalizedPath. If migration is not feasible,
retain the allowlist entry only with an approved issue reference and inline
justification.

🪄 Autofix

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• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

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Run ID: c44d9114-12d6-4e57-bb95-9a2c91fdff89

📥 Commits

Reviewing files that changed from the base of the PR and between e82c92d and a07831f.

📒 Files selected for processing (1)

• dylints/ban_std_pathbuf/src/allowlist.txt

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[zackees]

FIX!! Don't do the allow list.