Add ACMCC app source, Supabase backend, and project config

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

supabase/migrations/20260402031119_b79a1ff8-dcd9-41ce-92af-3b2a593cbe9f.sql

@@ -0,0 +1,15 @@
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1
+    FROM pg_constraint
+    WHERE conname = 'bills_source_invoice_id_fkey'
+      AND conrelid = 'public.bills'::regclass
+  ) THEN
+    ALTER TABLE public.bills
+    ADD CONSTRAINT bills_source_invoice_id_fkey
+    FOREIGN KEY (source_invoice_id)
+    REFERENCES public.invoices(id)
+    ON DELETE SET NULL;
+  END IF;
+END $$;