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/service/s3/errors.go

@@ -0,0 +1,60 @@
+// Code generated by private/model/cli/gen-api/main.go. DO NOT EDIT.
+
+package s3
+
+const (
+
+	// ErrCodeBucketAlreadyExists for service response error code
+	// "BucketAlreadyExists".
+	//
+	// The requested bucket name is not available. The bucket namespace is shared
+	// by all users of the system. Select a different name and try again.
+	ErrCodeBucketAlreadyExists = "BucketAlreadyExists"
+
+	// ErrCodeBucketAlreadyOwnedByYou for service response error code
+	// "BucketAlreadyOwnedByYou".
+	//
+	// The bucket you tried to create already exists, and you own it. Amazon S3
+	// returns this error in all Amazon Web Services Regions except in the North
+	// Virginia Region. For legacy compatibility, if you re-create an existing bucket
+	// that you already own in the North Virginia Region, Amazon S3 returns 200
+	// OK and resets the bucket access control lists (ACLs).
+	ErrCodeBucketAlreadyOwnedByYou = "BucketAlreadyOwnedByYou"
+
+	// ErrCodeInvalidObjectState for service response error code
+	// "InvalidObjectState".
+	//
+	// Object is archived and inaccessible until restored.
+	ErrCodeInvalidObjectState = "InvalidObjectState"
+
+	// ErrCodeNoSuchBucket for service response error code
+	// "NoSuchBucket".
+	//
+	// The specified bucket does not exist.
+	ErrCodeNoSuchBucket = "NoSuchBucket"
+
+	// ErrCodeNoSuchKey for service response error code
+	// "NoSuchKey".
+	//
+	// The specified key does not exist.
+	ErrCodeNoSuchKey = "NoSuchKey"
+
+	// ErrCodeNoSuchUpload for service response error code
+	// "NoSuchUpload".
+	//
+	// The specified multipart upload does not exist.
+	ErrCodeNoSuchUpload = "NoSuchUpload"
+
+	// ErrCodeObjectAlreadyInActiveTierError for service response error code
+	// "ObjectAlreadyInActiveTierError".
+	//
+	// This action is not allowed against this storage tier.
+	ErrCodeObjectAlreadyInActiveTierError = "ObjectAlreadyInActiveTierError"
+
+	// ErrCodeObjectNotInActiveTierError for service response error code
+	// "ObjectNotInActiveTierError".
+	//
+	// The source object of the COPY action is not in the active tier and is only
+	// stored in Amazon S3 Glacier.
+	ErrCodeObjectNotInActiveTierError = "ObjectNotInActiveTierError"
+)