Enhance PSR-7 uploaded file null handling in createUploadedFile method

[coderabbitai]

Description

The current implementation of the createUploadedFile method in src/http/Request.php uses null coalescing operators to handle potential null values from PSR-7 UploadedFileInterface methods, but may not handle all edge cases robustly.

Current Implementation

The method currently handles null values with simple defaults:

'tempName' => $psrFile->getStream()->getMetadata('uri') ?? '',

Proposed Enhancement

Implement more robust error handling for missing metadata, particularly when the PSR-7 stream doesn't have a file URI. This should include:

1. Explicit null checking for stream metadata
2. Fallback logic to create temporary files when URI metadata is missing
3. Proper error handling for temporary file creation failures

References

• Original discussion: Introduce Request bridge implementation with tests. #6 (comment)
• Related PR: Introduce Request bridge implementation with tests. #6

Priority

This is an enhancement that was deferred from the main Request bridge implementation PR to keep it focused.