fix(cli): restore "route" verb in three comments mechanically renamed to "source"

The install-route → install-source terminology rename swept three sites where
"route" was used as a verb ("forward/channel through"), not as the install-route
concept. That left two ungrammatical comments and one broken cross-reference.

- InstallationDiscovery.cs: "Source through the shared helper" → "Funnel through
  the shared helper". The sentence is about funneling a value through a helper
  function, not about an install source.

- PeerInstallProbeTests.cs: "Source internal probe diagnostics … into the xunit
  test output" → "Forward internal probe diagnostics …". The sentence is about
  forwarding LogDebug output, not about an install source.

- TemporaryNuGetConfigTests.cs: comment referenced the now-renamed test
  `GetAspireHomeDirectory_OnMacOS_PrRouteWithFirmlinkedProcessPath`. Update to
  `PrSourceWithFirmlinkedProcessPath` so the cross-reference is greppable.

Comment-only; no behavior change.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: radical

src/Aspire.Cli/Acquisition/InstallationDiscovery.cs

@@ -79,7 +79,7 @@ private InstallationInfo DescribeSelf(string? processPath, IReadOnlyList<Install
         // identifier the install scripts wrote, not the C# enum name. For
         // sidecars with an unrecognized source value we surface the raw
         // string so users see "(unknown: future-source)" rather than nothing.
-        // Source through the shared helper so an empty RawSource collapses to
+        // Funnel through the shared helper so an empty RawSource collapses to
         // null and the JSON shape of `--self` matches the full discovery walk.
         var source = sidecar is not null ? GetSourceFromSidecar(sidecar) : null;
 

tests/Aspire.Cli.Tests/Acquisition/PeerInstallProbeTests.cs

@@ -17,7 +17,7 @@ namespace Aspire.Cli.Tests.Acquisition;
 /// </summary>
 public class PeerInstallProbeTests(ITestOutputHelper outputHelper) : IDisposable
 {
-    // Source internal probe diagnostics (LogDebug for "JSON without an
+    // Forward internal probe diagnostics (LogDebug for "JSON without an
     // installation row", "invalid JSON", etc.) into the xunit test output
     // so a failure log tells us why the probe took whichever code path it
     // took. Keep the factory alive for the lifetime of the test class so

tests/Aspire.Cli.Tests/Packaging/TemporaryNuGetConfigTests.cs

@@ -141,7 +141,7 @@ public async Task CreateAsync_PackageSourceAddKeyMatchesPackageSourceMappingKey(
         // will accept after its own internal canonicalization (e.g. on macOS the
         // upstream caller must strip /private/var → /var before constructing the
         // PackageMapping — see CliPathHelper.StripMacOSFirmlinkPrefix and the
-        // GetAspireHomeDirectory_OnMacOS_PrRouteWithFirmlinkedProcessPath test).
+        // GetAspireHomeDirectory_OnMacOS_PrSourceWithFirmlinkedProcessPath test).
         // This test only pins the writer's symmetry contract.
         var mappings = new PackageMapping[]
         {