[Polish] Simplify __repr__ method in Request class

[Jiang-Jia-Jun]

Remove detailed string representation for Request class.

Motivation

解决RL中无法理解的问题，由于此函数仅用于DEBUG，暂时移除

Modifications

Usage or Command

Accuracy Tests

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
  • You can add new tags based on the PR content, but the semantics must be clear.
• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
• If the current PR is submitting to the release branch, make sure the PR has been submitted to the develop branch, then cherry-pick it to the release branch with the [Cherry-Pick] PR tag.

[paddle-bot]

Thanks for your contribution!

[Copilot]

Pull Request Overview

This PR simplifies the __repr__ method of the Request class by removing detailed string representation logic and replacing it with an empty string return. The change is motivated by resolving an unspecified issue in the RL (Reinforcement Learning) component where the current implementation cannot be understood, and since the function is only for debugging, it's being temporarily removed.

Key changes:

• Removed conditional debug-based string formatting from Request.__repr__
• Removed error handling wrapper in __repr__
• Simplified return value to empty string

[Copilot]

Returning an empty string from __repr__ violates Python conventions and breaks debugging expectations. The __repr__ method should return a useful string representation of the object. If the detailed representation is causing issues, consider returning a minimal but informative representation like f"<Request {self.request_id}>" or at minimum f"Request(request_id={self.request_id!r})" to maintain basic debugging capability. Returning an empty string will make logging, debugging, and error messages confusing when Request objects are printed.