Housekeeping: Windows doc refresh + scan.rs test-import cleanup

Codex-authored refresh of docs/WINDOWS.md and packaging/windows/{README,INSTALL}.md
from the 2026-07-01 Windows session; scan.rs qualifies super::running_executables()
to drop an unused glob import. PKGBUILD pkgver reflects the last Arch build
(auto-regenerated by makepkg's pkgver()).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packaging/windows/INSTALL.md

@@ -8,7 +8,7 @@ it once, then you and I connect directly to each other.
 
 ## 1. Install it
 
-1. Double-click **`peerspeak-0.4.0-setup.exe`** (the file I sent you).
+1. Double-click **`peerspeak-<version>-setup.exe`** (the file I sent you).
 
 2. **Windows will probably show a blue "Windows protected your PC" warning.**
    This is normal — it shows up for any app that isn't from a big company with a

packaging/windows/README.md

@@ -11,8 +11,9 @@ runtime, so there are no extra DLLs to bundle. The installer payload is just the
 
 ## Version compatibility
 
-The installer version tracks the crate version in `Cargo.toml` (currently
-**0.4.0**) — keep `MyAppVersion` in `peerspeak.iss` in sync when it changes.
+The installer version tracks the release version in `Cargo.toml` — keep
+`MyAppVersion` in `peerspeak.iss` in sync when cutting a release. Do not reuse an
+old installer filename after a crate-version bump.
 
 Per `VERSIONING.md`, a **MINOR** bump in `0.x` is a **breaking wire change**:
 peers on different MINOR versions can't connect (they fail fast at the