Netbeans fails to use svn CLI with password-stores = gpg-agent

### Apache NetBeans version

Apache NetBeans 26

### What happened

Netbeans fail to work with svn using gpg-agent as password-store. It just keeps asking for credentials that never work.

### Language / Project Type / NetBeans Component

Java Maven Project

### How to reproduce

Configure Netbeans to use subversion CLI (default I believe), and use gpg-agent as password-store.

### Did this work correctly in an earlier version?

No / Don't know

### Operating System

Gentoo Linux x86_64

### JDK

OpenJdk 21.0.7

### Apache NetBeans packaging

Apache NetBeans binary zip

### Anything else

It of course works flawlessly from a terminal.

### Are you willing to submit a pull request?

No

No source files, tests, or entry points are named. Reproduce the issue in Apache NetBeans 26 on Gentoo with the Subversion CLI and gpg-agent password store, then trace the Subversion integration and credential handling; done means authentication works without repeatedly requesting unusable credentials.

Written by the indexing model from the issue text.