fix: change avatar column type to TEXT to support long URLs

[maishivamhoo123]

Type of change

• Bug fix
  avatar column in user table is too small #1498

Description

This PR changes the avatar column type from VARCHAR to TEXT in the user table.

Reason:
Some Google profile image URLs exceed the previous character limit (1024/2048 chars), causing 500 errors during login or registration. Switching to TEXT ensures support for long URLs (up to 65kb).

Changes

1. Entity: Updated User struct in internal/entity/user_entity.go to use TEXT for the avatar field.
2. Migration: Added v1.8.2 migration (internal/migrations/v32.go) to alter the database column automatically.

Verification

• Tested locally with MySQL.
• Verified that inserting a string longer than 2048 characters into the avatar column now succeeds without error.

[maishivamhoo123]

@LinkinStars @team can you please review this pr.
Thank you!

[LinkinStars]

@maishivamhoo123 After testing, we found an error. This is an error encountered during testing with MySQL. You may need to verify whether the migration works correctly for different database types.
migrate failed: sync user table failed: Error 1101 (42000): BLOB, TEXT, GEOMETRY or JSON column 'avatar' can't have a default value

[maishivamhoo123]

@maishivamhoo123 After testing, we found an error. This is an error encountered during testing with MySQL. You may need to verify whether the migration works correctly for different database types. migrate failed: sync user table failed: Error 1101 (42000): BLOB, TEXT, GEOMETRY or JSON column 'avatar' can't have a default value

@LinkinStars sir i have migrated the version to v2.0.1 and i removed the default tag from Avatar .
can you please review the new PR thank you sir.

[maishivamhoo123]

@LinkinStars can you please for approve for workflows

[LinkinStars]

@LinkinStars can you please for approve for workflows

Approved. This PR will be merged in future.