## 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
