fix: ensure QueryRunner is released in workspace schema operations (#16649)

## Summary

Fixes a database connection leak in `WorkspaceDataSourceService` where
`QueryRunner.release()` was not being called when schema operations
failed.

## Problem

The `createWorkspaceDBSchema` and `deleteWorkspaceDBSchema` methods use
TypeORM's QueryRunner but didn't wrap the operations in
try-catch-finally blocks. When schema operations fail (e.g., permission
denied, schema conflicts), the `QueryRunner.release()` method was never
called.

**Impact:** Failed schema operations leak database connections, which
can exhaust the connection pool and cause the application to hang or
crash under load.

## Solution

Wrap both methods in try-finally blocks to ensure
`queryRunner.release()` is always called, regardless of whether the
operation succeeds or fails.

## Changes

- `createWorkspaceDBSchema`: Wrapped in try-finally to ensure connection
release
- `deleteWorkspaceDBSchema`: Wrapped in try-finally to ensure connection
release

packages/twenty-server/src/engine/workspace-datasource/workspace-datasource.service.ts

@@ -37,14 +37,15 @@ export class WorkspaceDataSourceService {
    */
   public async createWorkspaceDBSchema(workspaceId: string): Promise<string> {
     const schemaName = getWorkspaceSchemaName(workspaceId);
-
     const queryRunner = this.coreDataSource.createQueryRunner();
 
-    await queryRunner.createSchema(schemaName, true);
+    try {
+      await queryRunner.createSchema(schemaName, true);
 
-    await queryRunner.release();
-
-    return schemaName;
+      return schemaName;
+    } finally {
+      await queryRunner.release();
+    }
   }
 
   /**
@@ -56,12 +57,13 @@ export class WorkspaceDataSourceService {
    */
   public async deleteWorkspaceDBSchema(workspaceId: string): Promise<void> {
     const schemaName = getWorkspaceSchemaName(workspaceId);
-
     const queryRunner = this.coreDataSource.createQueryRunner();
 
-    await queryRunner.dropSchema(schemaName, true, true);
-
-    await queryRunner.release();
+    try {
+      await queryRunner.dropSchema(schemaName, true, true);
+    } finally {
+      await queryRunner.release();
+    }
   }
 
   public async executeRawQuery(