chore: close db-attribute removal (TML-2988)

[SevInf]

• Intent: Close the completed @db.* hard-cut project after PR TML-2988: Hard-cut @db.* lowering; add actionable diagnostics #1054 merged at ca1f3a16b; retain the mandatory final-retro learning as F27.
• Linear: Refs: TML-2988 · Remove @db.* attributes from PSL
• Scope: Project DoD evidence: all four hard-cut slices are complete; close-out material was classified as transient, while ADR 241 and F27 are durable; the external-reference scan found no references outside the removed project tree.
• Verification: git diff --check origin/main...HEAD and tracked close-out integrity only: the diff retains F27 while deleting the classified transient artefacts.

Summary by CodeRabbit

• Documentation
  • Made a minor whitespace/formatting adjustment around the boundary between two failure-mode sections (no content added or changed).

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yml

Review profile: CHILL

Plan: Pro Plus

Run ID: 7038b5be-1b75-4b1a-8ebe-d2d2fa042312

📥 Commits

Reviewing files that changed from the base of the PR and between 82ea1a2 and df0cf24.

📒 Files selected for processing (1)

• drive/calibration/failure-modes.md

💤 Files with no reviewable changes (1)

• drive/calibration/failure-modes.md

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📝 Walkthrough

Walkthrough

The change inserts whitespace between the F26 entry and the “Slice-shape scope traps” heading in the failure mode documentation. No failure-mode content or public declarations are modified.

Changes

Failure mode documentation

Layer / File(s)	Summary
Section boundary formatting drive/calibration/failure-modes.md	Adds whitespace between the F26 section and the “Slice-shape scope traps” heading.

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

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title matches the PR's close-out of the @db.* removal effort and identifies the main project-level change.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/close-remove-db-attributes

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