refactor: update get_redis return type and clean up main.py imports

[Ruixiaoke]

This pull request includes minor improvements to the codebase for better reliability and clarity. The main changes involve correcting the type annotation for the Redis client and reorganizing the import logic in the main application file.

Code quality and reliability:

• Updated the return type annotation of the get_redis function in app/infrastructure/redis_client.py to use the generic Redis type, improving compatibility and type correctness.

Code organization:

• Moved the logic for adding the app directory to the Python path to the top of app/main.py, ensuring proper module resolution before other imports.

[Copilot]

Pull Request Overview

This PR contains two refactoring changes: relocating the Python path modification to occur before module imports in main.py, and simplifying the Redis type hint in redis_client.py.

• Moved the Python path setup code to execute before imports to ensure proper module resolution
• Removed the generic type parameter [str] from the Redis type hint for cleaner typing

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
app/main.py	Relocated sys.path.insert() to execute before module imports
app/infrastructure/redis_client.py	Simplified Redis return type annotation from Redis[str] to Redis

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