fix(pg-codegen): add Jest moduleNameMapper for workspace dependencies

- Add moduleNameMapper configuration in packages/pg-codegen/jest.config.js
- Maps @launchql/* packages to packages/*/dist directories
- Maps pgsql-test, graphile-test, pg-env, and pg-cache to their dist directories
- Fixes Jest module resolution issues with pnpm's isolated structure
- Required for tests that import pgsql-test which depends on @launchql/logger

Author: sdqede

packages/pg-codegen/jest.config.js

@@ -14,5 +14,13 @@ module.exports = {
   transformIgnorePatterns: [`/node_modules/*`],
   testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$',
   moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
-  modulePathIgnorePatterns: ['dist/*']
+  modulePathIgnorePatterns: ['dist/*'],
+  moduleNameMapper: {
+    '^@launchql/logger$': '<rootDir>/../../packages/logger/dist',
+    '^@launchql/(.*)$': '<rootDir>/../../packages/$1/dist',
+    '^pgsql-test$': '<rootDir>/../../packages/pgsql-test/dist',
+    '^graphile-test$': '<rootDir>/../../packages/graphile-test/dist',
+    '^pg-env$': '<rootDir>/../../packages/pg-env/dist',
+    '^pg-cache$': '<rootDir>/../../packages/pg-cache/dist',
+  },
 };