fix: Resolve Gemini video file upload error

[PR-HARIHARAN]

[fix] Resolve Gemini video file upload error

Description

This PR fixes the video file upload error when using Gemini models with file inputs, addressing issue #4857.

Problem

Users were encountering a 400 INVALID_ARGUMENT error when trying to upload video files to Gemini models. The error occurred because:

1. The cookbook example was incorrectly using Video(content=video_file) instead of Video(url=video_file.uri)
2. The Google genai library has a bug where it sometimes doesn't include the 'file' key in upload responses, causing KeyError exceptions

Solution

1. Fixed Video Constructor Usage:

• Changed Video(content=video_file) to Video(url=video_file.uri) in the cookbook example
• The Video class expects a URL reference to uploaded files, not the file object itself

2. Added Robust Error Handling:

• Implemented comprehensive error handling for the Google library's KeyError bug
• Added graceful fallback using files.list() when file information is missing from upload responses
• Enhanced logging to help users understand what's happening during file uploads

Changes Made

Files Modified:

• cookbook/models/google/gemini/video_input_file_upload.py: Fixed Video constructor usage
• libs/agno/agno/models/google/gemini.py: Added error handling for Google library bugs

Key Changes:

1. Cookbook Fix: Updated video usage from Video(content=video_file) to Video(url=video_file.uri)
2. Error Handling: Added try-catch blocks around video and audio upload operations
3. Recovery Mechanism: Implemented fallback to retrieve file info when Google's library fails
4. Better Logging: Added informative error messages for debugging

Testing

• Verified original issue is resolved (400 INVALID_ARGUMENT error fixed)
• Tested error handling with Google library KeyError scenarios
• Validated end-to-end video upload and analysis workflow
• Confirmed code formatting with ruff
• Validated with mypy type checking
• Ran test suite to ensure no regressions

Impact

• Backward Compatible: No breaking changes to existing APIs
• Improved Reliability: Framework now handles upstream library bugs gracefully
• Better User Experience: Clear error messages and automatic recovery when possible
• Documentation: Fixed cookbook example that users follow

Related Issues

Fixes #4857

Checklist

• Code follows the project's coding standards
• Code has been formatted using ./scripts/format.bat
• Code has been validated using ./scripts/validate.bat
• Tests pass locally
• Changes are backward compatible
• PR title follows format: [fix] Resolve Gemini video file upload error
• PR description references the issue using fixes #4857
• Added comprehensive error handling
• Updated cookbook example with correct usage