docs(wsl): say what keeps a WSL distro up besides the holder (#36241)

On WSL 2.7.10 a process started through wsl.exe (orcad via setsid -f, its
terminals) keeps the distro Running with no Windows-side client; the holder
only covers the gaps when nothing runs. Reword the comments that assumed
only a Windows client keeps a distro from idling out.

src/main/wsl/wsl-distro-holder-command.ts

@@ -72,7 +72,8 @@ export function buildWslDistroHolderScript(
   ].join('\n')
 }
 
-/** `wsl.exe` argv for a holder: only a Windows-side WSL client keeps a distro from idling out. */
+/** `wsl.exe` argv for a holder. WSL keeps a distro up while a Windows-side client or anything started
+ * through one still runs (orcad, its terminals); the holder covers the gaps when nothing does. */
 export function buildWslDistroHolderArgs(distro: string): string[] {
   return buildWslExecArgs(distro, [
     '/bin/sh',

src/main/wsl/wsl-distro-holder-types.ts

@@ -57,7 +57,7 @@ export type WslDistroHolder = {
   ): Promise<WslDistroHolderEnsureResult>
   /** Startup: keep holders a previous Orca left running, drop records that are provably stale. */
   adoptHolders(): Promise<WslDistroHolderAdoption[]>
-  /** Explicit stop only; the distro then idles out on WSL's own schedule. */
+  /** Explicit stop only; the distro then stops on WSL's schedule once nothing else runs in it. */
   release(distro: string): Promise<WslDistroHolderState>
   /** Every recorded holder (uninstall, hosts turned off); kills only verified holders. */
   releaseAll(options?: WslDistroHolderReleaseOptions): Promise<WslDistroHolderAdoption[]>

src/main/wsl/wsl-host-removal.ts

@@ -42,7 +42,7 @@ export async function removeWslHostServer(
         }))
     }
     await connector.disconnect(record.distro)
-    // Without its holder the distro idles out, pending or not.
+    // Without its holder the distro stops once nothing started in it (a peer's orcad, user jobs) runs.
     await connector.releaseHolder(record.distro)
   }
   serverStop = noteServerKeptForPeers(userDataPath, record.environmentId, serverStop)