[CORRUPTED] Synthetic Benchmark PR #28787 - feat: optimize for migration versions

[ofir-frd]

Benchmark PR langgenius#28787

Type: Corrupted (contains bugs)

Original PR Title: feat: optimize for migration versions
Original PR Description: > [!IMPORTANT]

1. Make sure you have read our contribution guidelines
2. Ensure there is an associated issue and you have been assigned to it
3. Use the correct syntax to link this PR: Fixes #<issue number>.

Summary

I want to simplify the modification of migration version files when adapting to MySQL.In the past, when I adapted the code for MySQL, I used conditional statements to ensure the PostgreSQL parts remained unaffected. However, we can actually reduce some of these conditionals to optimize the code.

close langgenius#28455
close langgenius#26422

Screenshots

Before	After
...	...

Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

Original PR URL: langgenius#28787

Compliance Violation

• Rule: Python Code Must Enforce Strong Typing
• Language: Python
• File: api/migrations/versions/2025_08_13_1605-0e154742a5fa_add_provider_model_multi_credential.py