Add ACMCC app source, Supabase backend, and project config

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

supabase/migrations/20260319173005_1e43fd37-7fff-458a-b96f-906721c0b69f.sql

@@ -0,0 +1,25 @@
+
+CREATE TABLE public.migration_field_mappings (
+  id UUID NOT NULL DEFAULT gen_random_uuid() PRIMARY KEY,
+  mapping_type TEXT NOT NULL CHECK (mapping_type IN ('table', 'column', 'id_value')),
+  source_table TEXT,
+  destination_table TEXT,
+  source_field TEXT,
+  destination_field TEXT,
+  source_value TEXT,
+  destination_value TEXT,
+  description TEXT,
+  is_active BOOLEAN NOT NULL DEFAULT true,
+  created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+  updated_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
+  created_by UUID REFERENCES auth.users(id)
+);
+
+ALTER TABLE public.migration_field_mappings ENABLE ROW LEVEL SECURITY;
+
+CREATE POLICY "Admins can manage migration mappings"
+ON public.migration_field_mappings
+FOR ALL
+TO authenticated
+USING (public.has_role(auth.uid(), 'admin'))
+WITH CHECK (public.has_role(auth.uid(), 'admin'));