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/walker.go

@@ -0,0 +1,25 @@
+package ini
+
+// Walk will traverse the AST using the v, the Visitor.
+func Walk(tree []AST, v Visitor) error {
+	for _, node := range tree {
+		switch node.Kind {
+		case ASTKindExpr,
+			ASTKindExprStatement:
+
+			if err := v.VisitExpr(node); err != nil {
+				return err
+			}
+		case ASTKindStatement,
+			ASTKindCompletedSectionStatement,
+			ASTKindNestedSectionStatement,
+			ASTKindCompletedNestedSectionStatement:
+
+			if err := v.VisitStatement(node); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}