fix: Fix S3 credential auto-refresh mechanism and extend buffer window

[rdheekonda]

Refactored the S3 credential management system to resolve race conditions and improve reliability during long-running operations.

Key Changes:

• Introduced dedicated CredentialManager class for centralized s3 credential lifecycle management
• Implemented automatic retry mechanism with exponential backoff for credential-related failures
• Extended credential refresh buffer from 5 to 15 minutes to prevent edge-case expirations
• Replaced decorator-based refresh pattern with operation-wrapped retry logic

Added:

• CredentialManager class with automatic refresh detection and retry logic
• Error-specific retry handling for ExpiredToken, InvalidAccessKeyId, and SignatureDoesNotMatch
• Comprehensive logging for credential refresh events and failure modes

Changed:

-Migrated ArtifactStorage and RunSpan to use centralized credential manager

• Updated buffer window from 300s to 900s for more reliable refresh timing
• Simplified filesystem credential passing through dedicated manager interface

Removed:

• storage_utils.py decorator-based refresh mechanism
• Manual credential refresh methods in main Dreadnode class
• Direct S3FileSystem parameter passing in span constructors

Testing: Validated with 1.40 hour continuous operation - credential refreshes occurred seamlessly without interruption to ongoing uploads and operations.

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Generated Summary:

• Refactored ArtifactStorage to utilize CredentialManager for handling S3 credentials, improving management of authentication.
• Removed the with_credential_refresh decorator and corresponding methods for credential refreshing, simplifying error handling.
• Introduced the CredentialManager class to manage S3 credentials, incorporating automatic refresh logic.
• Adjusted the FS_CREDENTIAL_REFRESH_BUFFER from 5 to 15 minutes to allow a longer window before refreshing credentials.
• Updated methods in ArtifactStorage and RunSpan to use CredentialManager, including operations for storing files and batch uploads.
• Removed the storage_utils.py file as its functionality is now integrated into the CredentialManager.
• Bumped project version to 1.13.3 to reflect changes.

This summary was generated with ❤️ by rigging