Extract ourdigital-estimate-engine; presales-seo now calls it

New skill 96-ourdigital-estimate-engine: method-aware quoting engine
(effort / coaching / procurement) with universal rate_card + per-service
catalog. Real catalogs: seo (effort), education (coaching); stubs:
digital_ads, digital_branding. Validated to reproduce real quotes —
SEO basic ₩10.5M / treatment ₩25.0M, SHR chain ₩29.5M, L'Escape basic
₩10.5M, GA4/GTM coaching ₩1,570,000, procurement +15%.

Refactor 95-ourdigital-presales-seo: remove rate_card.yaml, sow_templates.yaml,
estimate.py (migrated to engine); add findings_to_scope.py; Stage 5 now maps
findings→scope.json and calls the engine CLI. build_deck/kg_query unchanged;
end-to-end validated on SHR (29.5M) + deck renders engine estimate.json.

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

custom-skills/96-ourdigital-estimate-engine/scripts/methods/procurement.py

@@ -0,0 +1,18 @@
+"""Procurement method: cost = Σ(unit_cost × qty × (1 + markup)) for non-labor items."""
+
+
+def build(scope, rate, catalog):
+    markup = rate.get("procurement_markup", 0.15)
+    items, total = [], 0.0
+    for it in scope.get("items", []):
+        qty = it.get("qty", 1)
+        amt = it["unit_cost"] * qty * (1 + markup)
+        items.append({"label": it["label"], "unit_cost": it["unit_cost"], "qty": qty,
+                      "markup": markup, "amount": amt, "currency": it.get("currency", "KRW")})
+        total += amt
+    return {
+        "kind": "procurement", "service": catalog.get("service", "procurement"),
+        "label": "조달 항목 (Buying & Supplying)", "markup": markup,
+        "items": items, "subtotal_sum": total, "proposal": int(round(total)),
+        "stub": bool(catalog.get("_stub", False)),
+    }