Patch pg pool (#12081)

This PR implements a global PostgreSQL connection pool sharing
mechanism.

- Patches pg.Pool to reuse connection pools across the application when
connection parameters match, reducing resource overhead.
- New environment variables allow enabling/disabling sharing and
configuring pool size, idle timeout, and client exit behavior.

WorkspaceDatasourceFactory will now use shared pools if enabled, this
will avoid recreating 10 connections for each pods for each workspace.

---------

Co-authored-by: Charles Bochet <charlesBochet@users.noreply.github.com>

packages/twenty-server/src/engine/twenty-orm/twenty-orm.module.ts

@@ -2,6 +2,7 @@ import { Global, Module } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
 
 import { FeatureFlagModule } from 'src/engine/core-modules/feature-flag/feature-flag.module';
+import { TwentyConfigModule } from 'src/engine/core-modules/twenty-config/twenty-config.module';
 import { DataSourceModule } from 'src/engine/metadata-modules/data-source/data-source.module';
 import { ObjectMetadataEntity } from 'src/engine/metadata-modules/object-metadata/object-metadata.entity';
 import { PermissionsModule } from 'src/engine/metadata-modules/permissions/permissions.module';
@@ -15,6 +16,8 @@ import { TwentyORMGlobalManager } from 'src/engine/twenty-orm/twenty-orm-global.
 import { TwentyORMManager } from 'src/engine/twenty-orm/twenty-orm.manager';
 import { WorkspaceCacheStorageModule } from 'src/engine/workspace-cache-storage/workspace-cache-storage.module';
 
+import { PgPoolSharedModule } from './pg-shared-pool/pg-shared-pool.module';
+
 @Global()
 @Module({
   imports: [
@@ -29,12 +32,19 @@ import { WorkspaceCacheStorageModule } from 'src/engine/workspace-cache-storage/
     WorkspaceFeatureFlagsMapCacheModule,
     WorkspacePermissionsCacheModule,
     FeatureFlagModule,
+    TwentyConfigModule,
+    PgPoolSharedModule,
   ],
   providers: [
     ...entitySchemaFactories,
     TwentyORMManager,
     TwentyORMGlobalManager,
   ],
-  exports: [EntitySchemaFactory, TwentyORMManager, TwentyORMGlobalManager],
+  exports: [
+    EntitySchemaFactory,
+    TwentyORMManager,
+    TwentyORMGlobalManager,
+    PgPoolSharedModule,
+  ],
 })
 export class TwentyORMModule {}