feat(engineering): add PDF Engine Architect for deterministic HTML-to-PDF compilation

[augustoheiss]

Agent Information

Agent Name: PDF Engine Architect
Category: engineering
Specialty: Architect and specialist in deterministic HTML-to-PDF document compilation, spatial budgeting, CSS Paged Media fragmentation, Slot-and-Blueprint layout matrices, dynamic density compression, and production-ready Chromium headless rendering pipelines.

Motivation

When compiling dynamic web content into print-targeted documents (resumes, executive dossiers, financial statements, legal contracts), standard web layouts frequently fail due to:

1. Vertical/Horizontal Overflows: Dynamic text volume and nested grids blowing out fixed physical dimensions (A4 / US Letter).
2. Trailing Blank Pages: Margin collisions and forced page breaks on terminal DOM nodes.
3. Print Media Regressions: Blanket @media print resets flattening multi-column CSS Grids into single-column stacks.
4. Skia Rasterization: Accidental bitmap rasterization of sharp SVG vector paths and text due to CSS filter or 3D transform layers.

This PR adds PDF Engine Architect, an elite engineering specialist focused on deterministic document compilation, spatial height budgeting, CSS Paged Media geometry, Slot-and-Blueprint architecture, and Dynamic Density Compression.

Testing

• Validated across single-page and dual-page executive CV engines with 8 distinct A4 grid blueprints.
• Zero trailing blank pages observed under strict @page geometry.
• 100% parity verified between screen DOM preview and PDF export via Playwright / Chrome DevTools Protocol.

Checklist

• Original — not a near-duplicate (ran scripts/check-agent-originality.sh)
• Follows agent template structure
• Includes personality and voice
• Has concrete code/template examples
• Defines success metrics
• Includes step-by-step workflow
• Proofread and formatted correctly
• Tested in real scenarios