fix: automatic column additions, permissions grants and docs updates for seamless upgrades

postgresql/procedures/00_schema_create.sql

@@ -15,6 +15,14 @@ CREATE TABLE IF NOT EXISTS partitions.config (
     PRIMARY KEY (table_name)
 );
 
+-- Ensure the future_partitions column exists for users upgrading from older versions
+DO $$
+BEGIN
+    IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_schema = 'partitions' AND table_name = 'config' AND column_name = 'future_partitions') THEN
+        ALTER TABLE partitions.config ADD COLUMN future_partitions integer NOT NULL DEFAULT 5;
+    END IF;
+END $$;
+
 -- Table to track installed version of the partitioning solution
 CREATE TABLE IF NOT EXISTS partitions.version (
     version text PRIMARY KEY,