Implement ourdigital-presales-seo skill

SKILL.md orchestration (8 gated stages), references (rate_card.yaml,
findings_to_service rubric, competitor sets), findings.schema.json contract,
and scripts: kg_query.py (generalized KG examination), estimate.py
(findings→rate-card 견적 md/xlsx/json), build_deck.py (9-slide branded PPTX),
render_pdf.sh (Korean PDF via headless Chrome), plus client_brief.html template.

Validated on Sono Hotels & Resorts findings: estimate OD-2026-001
(23-47M KRW) and a 9-slide deck generated cleanly.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

custom-skills/95-ourdigital-presales-seo/scripts/render_pdf.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# Render an HTML brief to PDF via headless Chrome (uses system fonts → Korean OK).
+# Part of ourdigital-presales-seo (Stage 6).
+# Usage: render_pdf.sh <input.html> [output.pdf]
+set -euo pipefail
+HTML="${1:?usage: render_pdf.sh <input.html> [output.pdf]}"
+OUT="${2:-${HTML%.html}.pdf}"
+
+CHROME="/Applications/Google Chrome.app/Contents/MacOS/Google Chrome"
+if [ ! -x "$CHROME" ]; then CHROME="/Applications/Brave Browser.app/Contents/MacOS/Brave Browser"; fi
+if [ ! -x "$CHROME" ]; then CHROME="/Applications/Microsoft Edge.app/Contents/MacOS/Microsoft Edge"; fi
+if [ ! -x "$CHROME" ]; then echo "ERROR: no Chromium-based browser found for PDF rendering" >&2; exit 1; fi
+
+DIR="$(cd "$(dirname "$HTML")" && pwd)"
+BASE="$(basename "$HTML")"
+"$CHROME" --headless --disable-gpu --no-pdf-header-footer \
+  --print-to-pdf="$OUT" "file://$DIR/$BASE" 2>/dev/null
+echo "Wrote $OUT"