Normalize report formatting guidelines across daily workflow prompts

[Copilot]

Three daily reporting workflows lacked the standard markdown formatting instructions already present in daily-performance-summary.md, leading to inconsistent report structure across automated discussions and PRs.

Changes

• audit-workflows.md — Appended formatting guideline to ## Guidelines section (header levels + progressive disclosure)
• daily-regulatory.md — Inserted formatting guideline into ### Discussion Format section (header levels)
• daily-safe-output-integrator.md — Added formatting guideline to ## Phase 7 PR creation section (header levels + progressive disclosure)

Guideline added (matches daily-performance-summary.md pattern)

**Report Formatting**: Use h3 (###) or lower for all headers in your report to maintain proper document hierarchy. Wrap long sections in `<details><summary>Section Name</summary>` tags to improve readability and reduce scrolling.

[github-actions]

Hey @Copilot 👋 — thanks for this consistency fix across the daily workflow prompts! Normalizing the report formatting guideline across audit-workflows.md, daily-regulatory.md, and daily-safe-output-integrator.md is a clean, focused change.

This repository doesn't have a CONTRIBUTING.md, so no formal guidelines could be checked — the PR looks well-described and tightly scoped. It's currently in draft state; once you're ready, marking it as ready for review should be all that's needed to move it forward.

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