feat: AGB cleanup + English Terms v2

- 106: Remove AGB duplicates and obsolete templates (terms_of_service
  DE/EN v1.0, liability clause) — replaced by agb v2.0
- 107: English Terms and Conditions v2 (EU-compliant, same structure
  as DE version with all IF-blocks)

DB now has exactly 2 AGB templates: DE + EN, both v2.0.0

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend-compliance/migrations/106_cleanup_agb_duplicates.sql

@@ -0,0 +1,51 @@
+-- Migration 106: AGB-Bereinigung — Duplikate und veraltete Templates entfernen
+--
+-- Entfernt:
+-- 1. AGB Duplikat (zweiter Eintrag aus Migration 023, identischer Inhalt wie 090)
+-- 2. terms_of_service DE v1.0.0 (allererste Version aus Migration 018, ersetzt durch agb v2)
+-- 3. terms_of_service EN v1.0.0 (alte englische Version aus Migration 019, wird durch agb EN v2 ersetzt)
+-- 4. clause/liability_clause EN (redundant — AGB v2 § 12 deckt Haftung vollstaendig ab)
+
+-- Sicherheitshalber: Nur loeschen wenn die neuen Templates existieren
+DO $$
+BEGIN
+  -- Pruefe ob unser AGB v2 existiert
+  IF EXISTS (
+    SELECT 1 FROM compliance_legal_templates
+    WHERE document_type = 'agb' AND version = '2.0.0'
+    AND tenant_id = '9282a473-5c95-4b3a-bf78-0ecc0ec71d3e'
+    AND length(content) > 20000
+  ) THEN
+
+    -- 1. AGB Duplikat loeschen (behalte nur das neueste)
+    DELETE FROM compliance_legal_templates
+    WHERE document_type = 'agb'
+    AND tenant_id = '9282a473-5c95-4b3a-bf78-0ecc0ec71d3e'
+    AND id != (
+      SELECT id FROM compliance_legal_templates
+      WHERE document_type = 'agb'
+      AND tenant_id = '9282a473-5c95-4b3a-bf78-0ecc0ec71d3e'
+      ORDER BY updated_at DESC
+      LIMIT 1
+    );
+
+    RAISE NOTICE 'AGB Duplikat entfernt';
+
+    -- 2. Veraltete terms_of_service loeschen
+    DELETE FROM compliance_legal_templates
+    WHERE document_type = 'terms_of_service'
+    AND tenant_id = '9282a473-5c95-4b3a-bf78-0ecc0ec71d3e';
+
+    RAISE NOTICE 'terms_of_service (DE+EN v1) entfernt';
+
+    -- 3. Liability Clause loeschen (redundant zu AGB § 12)
+    DELETE FROM compliance_legal_templates
+    WHERE document_type = 'clause'
+    AND tenant_id = '9282a473-5c95-4b3a-bf78-0ecc0ec71d3e';
+
+    RAISE NOTICE 'clause (Liability) entfernt';
+
+  ELSE
+    RAISE NOTICE 'AGB v2 nicht gefunden — keine Bereinigung durchgefuehrt';
+  END IF;
+END $$;