Add ACMCC app source, Supabase backend, and project config

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

supabase/migrations/20260319000555_c1f7c767-3d2b-44ea-bdb4-5f75939f0fae.sql

@@ -0,0 +1,10 @@
+
+-- Add a unique constraint on owners for Buildium sync upserts
+-- Using association_id + first_name + last_name + property_address to handle multiple owners at same address
+CREATE UNIQUE INDEX IF NOT EXISTS owners_buildium_sync_key 
+ON public.owners (association_id, first_name, last_name, property_address) 
+WHERE property_address IS NOT NULL;
+
+-- Add buildium_owner_id column for future direct ID mapping
+ALTER TABLE public.owners ADD COLUMN IF NOT EXISTS buildium_owner_id text;
+CREATE UNIQUE INDEX IF NOT EXISTS owners_buildium_id_key ON public.owners (buildium_owner_id) WHERE buildium_owner_id IS NOT NULL;