Fix: Check if junction table exists before creation #2277

[khushalmajoka]

This pull request addresses the issue #2277, where the createJunctionTable function in utils.ts does not check if a table already exists before attempting to create it. The following changes have been made:

• Table Existence Check: Added a check to ensure the junction table does not already exist before creating it. This prevents potential errors when the table already exists.
• Optional Indexing: Implemented optional indexing on the primary keys for larger tables to improve query performance.
• Improved Error Handling: Enhanced error handling in the dropOnUpdateTrigger, createOnUpdateTrigger, dropUpdatedAtTriggerFunction, and createUpdateAtTriggerFunction functions for better debugging and maintenance.