bug fix - Fixed error in cleanDatabase that would cause drift

Added an extra line to ensure the query does not include the migration table. This kept on getting cleared.

Reintroduced shadow db to detect drift.

src/prisma/schema.prisma

@@ -6,9 +6,10 @@ generator client {
 }
 
 datasource db {
-  provider  = "postgresql"
-  url       = env("POSTGRES_PRISMA_URL") // uses connection pooling
-  directUrl = env("POSTGRES_URL_NON_POOLING") // uses a direct connection
+  provider          = "postgresql"
+  url               = env("POSTGRES_PRISMA_URL") // uses connection pooling
+  directUrl         = env("POSTGRES_URL_NON_POOLING") // uses a direct connection
+  shadowDatabaseUrl = env("SHADOW_DATABASE_URL")
 }
 
 model User {

src/prisma/seed/clean/cleanDatabase.ts

@@ -13,8 +13,9 @@ const cleanDatabase = async () => {
       DO $$
       DECLARE
           statements CURSOR FOR
-              SELECT tablename FROM pg_tables
-              WHERE schemaname = 'public';
+            SELECT tablename FROM pg_tables
+            WHERE schemaname = 'public'
+            AND tablename != '_prisma_migrations';
       BEGIN
           FOR statement IN statements LOOP
               EXECUTE 'TRUNCATE TABLE ' || quote_ident(statement.tablename) || ' CASCADE;';