Refactor delete handling and improve logging in event processing

- Updated the HandleDelete function to allow delete events to be stored even if no valid targets are found, enhancing flexibility in event management.
- Improved logging to provide clearer insights when no deletions are processed, ensuring that issues are logged without blocking event acceptance.
- Refactored SHA256 validation tests and adjusted expected values to ensure accuracy in hash comparisons.
- Enhanced various test cases to improve coverage and reliability across the application.

pkg/blossom/utils.go

@@ -17,7 +17,7 @@ const (
 	maxRangeSize    = 10 * 1024 * 1024 // 10MB max range request
 )
 
-var sha256Regex = regexp.MustCompile(`^[a-fA-F0-9]{64}`)
+var sha256Regex = regexp.MustCompile(`[a-fA-F0-9]{64}`)
 
 // CalculateSHA256 calculates the SHA256 hash of data
 func CalculateSHA256(data []byte) []byte {