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/ini/ws_token.go

@@ -0,0 +1,24 @@
+package ini
+
+import (
+	"unicode"
+)
+
+// isWhitespace will return whether or not the character is
+// a whitespace character.
+//
+// Whitespace is defined as a space or tab.
+func isWhitespace(c rune) bool {
+	return unicode.IsSpace(c) && c != '\n' && c != '\r'
+}
+
+func newWSToken(b []rune) (Token, int, error) {
+	i := 0
+	for ; i < len(b); i++ {
+		if !isWhitespace(b[i]) {
+			break
+		}
+	}
+
+	return newToken(TokenWS, b[:i], NoneType), i, nil
+}