Update migrate_to_v1_vectorstore.py

[Yash-2707]

Enhancement made in the code by error handling and logging batch processing and new functionalities like backup , progress tracking
Title: Enhance Vector Migration with Error Handling, Logging, Backup, and Progress Tracking

Description:

This PR introduces several enhancements to the vector migration scripts, focusing on robustness, maintainability, and user experience.

What kind of change does this PR introduce?

Feature: Adds new functionalities like backup, progress tracking, and improved error handling.
Enhancement: Improves existing code with better logging and batch processing.
Why was this change needed?

The original migration scripts lacked error handling and logging, making it difficult to diagnose issues during migration.
There was no backup mechanism, which posed a risk of data loss during migrations.
Lack of progress tracking made it difficult to estimate the migration progress.
The code could benefit from batch processing optimizations for MongoDB operations.
Other information:

This PR addresses these issues by:
Implementing detailed logging using Python's logging module.
Adding a backup mechanism to create copies of collections before migration.
Introducing progress bars using the tqdm library to provide visual feedback during migration.
Enhancing error handling to capture and log exceptions.
Optimizing MongoDB operations for batch processing.
These changes make the migration scripts more reliable, easier to maintain, and provide a better user experience.

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

• Why was this change needed? (You can also link to an open issue here)

• Other information:

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[dartpain]

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