deps: update vendor dependencies for S3-compatible storage

Updates AWS SDK and removes Blazer B2 dependency in favor of unified
S3-compatible approach. Includes configuration examples and documentation.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

vendor/github.com/aws/aws-sdk-go/internal/s3shared/resource_request.go

@@ -0,0 +1,45 @@
+package s3shared
+
+import (
+	"github.com/aws/aws-sdk-go/aws"
+	awsarn "github.com/aws/aws-sdk-go/aws/arn"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/internal/s3shared/arn"
+)
+
+// ResourceRequest represents the request and arn resource
+type ResourceRequest struct {
+	Resource arn.Resource
+	Request  *request.Request
+}
+
+// ARN returns the resource ARN
+func (r ResourceRequest) ARN() awsarn.ARN {
+	return r.Resource.GetARN()
+}
+
+// AllowCrossRegion returns a bool value to denote if S3UseARNRegion flag is set
+func (r ResourceRequest) AllowCrossRegion() bool {
+	return aws.BoolValue(r.Request.Config.S3UseARNRegion)
+}
+
+// IsCrossPartition returns true if client is configured for another partition, than
+// the partition that resource ARN region resolves to.
+func (r ResourceRequest) IsCrossPartition() bool {
+	return r.Request.ClientInfo.PartitionID != r.Resource.GetARN().Partition
+}
+
+// IsCrossRegion returns true if ARN region is different than client configured region
+func (r ResourceRequest) IsCrossRegion() bool {
+	return IsCrossRegion(r.Request, r.Resource.GetARN().Region)
+}
+
+// HasCustomEndpoint returns true if custom client endpoint is provided
+func (r ResourceRequest) HasCustomEndpoint() bool {
+	return len(aws.StringValue(r.Request.Config.Endpoint)) > 0
+}
+
+// IsCrossRegion returns true if request signing region is not same as configured region
+func IsCrossRegion(req *request.Request, otherRegion string) bool {
+	return req.ClientInfo.SigningRegion != otherRegion
+}