refactor: Consolidate standalone services into admin-v2, add new SDK modules

Remove standalone services (ai-compliance-sdk root, developer-portal,
dsms-gateway, dsms-node, night-scheduler) and legacy compliance/dsgvo pages.
Add new SDK pipeline modules (academy, document-crawler, dsb-portal,
incidents, whistleblower, reporting, sso, multi-tenant, industry-templates).
Add drafting engine, legal corpus files (AT/CH/DE), pitch-deck,
blog and Förderantrag pages.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

admin-v2/ai-compliance-sdk/internal/gci/validity.go

@@ -0,0 +1,59 @@
+package gci
+
+import (
+	"math"
+	"time"
+)
+
+const (
+	// GracePeriodDays is the number of days after expiry during which
+	// the certificate still contributes (with declining factor)
+	GracePeriodDays = 180
+
+	// DecayStartDays is how many days before expiry the linear decay begins
+	DecayStartDays = 180
+)
+
+// CalculateValidityFactor computes the validity factor for a certificate
+// based on its expiry date.
+//
+// Rules:
+// - Certificate not yet expiring (>6 months): factor = 1.0
+// - Certificate expiring within 6 months: linear decay from 1.0 to 0.5
+// - Certificate expired: linear decay from 0.5 to 0.0 over grace period
+// - Certificate expired beyond grace period: factor = 0.0
+func CalculateValidityFactor(validUntil time.Time, now time.Time) float64 {
+	daysUntilExpiry := validUntil.Sub(now).Hours() / 24.0
+
+	if daysUntilExpiry > float64(DecayStartDays) {
+		// Not yet in decay window
+		return 1.0
+	}
+
+	if daysUntilExpiry > 0 {
+		// In pre-expiry decay window: linear from 1.0 to 0.5
+		fraction := daysUntilExpiry / float64(DecayStartDays)
+		return 0.5 + 0.5*fraction
+	}
+
+	// Certificate is expired
+	daysExpired := -daysUntilExpiry
+	if daysExpired > float64(GracePeriodDays) {
+		return 0.0
+	}
+
+	// In grace period: linear from 0.5 to 0.0
+	fraction := 1.0 - (daysExpired / float64(GracePeriodDays))
+	return math.Max(0, 0.5*fraction)
+}
+
+// IsExpired returns true if the certificate is past its validity date
+func IsExpired(validUntil time.Time, now time.Time) bool {
+	return now.After(validUntil)
+}
+
+// IsExpiringSoon returns true if the certificate expires within the decay window
+func IsExpiringSoon(validUntil time.Time, now time.Time) bool {
+	daysUntil := validUntil.Sub(now).Hours() / 24.0
+	return daysUntil > 0 && daysUntil <= float64(DecayStartDays)
+}