improve error handling and data existence checks

[kumarrohitdev]

PR Fixes:

• 1
• 2

Resolves #[Issue Number if there]

Checklist before requesting a review

• [yes ] I have performed a self-review of my code
• [yes ] I assure there is no similar/duplicate pull request regarding same issue

[kumarrohitdev]

@hkirat @devsargam @siinghd
Changes made to improve database seeding process:

1. Added data existence checks:

   • Now checks for existing users, courses, content, and events before seeding
   • Provides detailed count of existing records in each table
   • Prevents accidental overwriting of existing data

2. Improved error handling:

   • Added specific error messages for each seeding operation
   • Added visual indicators (emojis) for better error visibility
   • Included helpful suggestions when data already exists

3. Enhanced logging:

   • Added progress indicators for each seeding step
   • Clear success/failure messages for each operation
   • Better error messages with specific details about what failed

This change helps prevent data loss and provides better feedback during the seeding process.