feat(crm): end_customers table, RLS, wizard customer selector, /my-customers CRUD, GDPR anonymization

shop/supabase/migrations/20260617_end_customers.sql

@@ -0,0 +1,27 @@
+-- Migration: end_customers table + RLS + orders.end_customer_id
+
+CREATE TABLE IF NOT EXISTS end_customers (
+  id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  partner_id    UUID NOT NULL REFERENCES profiles(id) ON DELETE CASCADE,
+  company_name  TEXT NOT NULL,
+  vat_id        TEXT,
+  first_name    TEXT,
+  last_name     TEXT,
+  street        TEXT,
+  zip           TEXT,
+  city          TEXT,
+  is_anonymized BOOLEAN NOT NULL DEFAULT false,
+  created_at    TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+ALTER TABLE end_customers ENABLE ROW LEVEL SECURITY;
+
+DROP POLICY IF EXISTS "Partner sehen nur eigene Endkunden" ON end_customers;
+
+CREATE POLICY "Partner sehen nur eigene Endkunden"
+ON end_customers FOR ALL
+USING (auth.uid() = partner_id)
+WITH CHECK (auth.uid() = partner_id);
+
+ALTER TABLE orders
+  ADD COLUMN IF NOT EXISTS end_customer_id UUID REFERENCES end_customers(id) ON DELETE SET NULL;