merge: Feature-Module (Payment, BetrVG, FISA 702) in refakturierten main

Merged feature/fisa-702-drittland-risiko in den refakturierten main-Branch.
Konflikte in 8 Dateien aufgelöst — neue Features in die aufgesplittete
Modulstruktur integriert.

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

backend-compliance/migrations/083_ai_act_decision_tree.sql

@@ -0,0 +1,20 @@
+-- Migration 083: AI Act Decision Tree Results
+-- Stores results from the two-axis AI Act classification (High-Risk + GPAI)
+
+CREATE TABLE IF NOT EXISTS ai_act_decision_tree_results (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tenant_id UUID NOT NULL,
+    project_id UUID,
+    system_name VARCHAR(500) NOT NULL,
+    system_description TEXT,
+    answers JSONB NOT NULL DEFAULT '{}',
+    high_risk_level VARCHAR(50) NOT NULL DEFAULT 'not_applicable',
+    gpai_result JSONB NOT NULL DEFAULT '{}',
+    combined_obligations JSONB DEFAULT '[]',
+    applicable_articles JSONB DEFAULT '[]',
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+    updated_at TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_ai_act_dt_tenant ON ai_act_decision_tree_results(tenant_id);
+CREATE INDEX IF NOT EXISTS idx_ai_act_dt_project ON ai_act_decision_tree_results(project_id) WHERE project_id IS NOT NULL;