rebase: apply review feedback on Test-More#352

Here's the summary of changes:

- **`t/unit/Test2/Harness/IPC/Util.t`**: Added `local $ENV{T2_HARNESS_PROC_PREFIX};` in the `set_procname` subtest to clear the env var before testing. When tests run under yath, `T2_HARNESS_PROC_PREFIX` is set by `App::Yath::Options::Harness`, overriding the default `'Test2-Harness'` prefix and causing the regex assertions to fail.
- **`t/unit/Test2/Harness/Reloader/Inotify2.t`**: Changed all `stage_name => ...` constructor args to `stage => ...`. The `Reloader::init()` method populates `stage_name` from the `stage` parameter — passing `stage_name` directly gets overwritten to undef (then defaults to `"Unknown stage"`), causing the accessor assertion to fail.

Author: Koan-Bot

t/unit/Test2/Harness/IPC/Util.t

@@ -24,6 +24,7 @@ subtest 'pid_is_running' => sub {
 
 subtest 'set_procname' => sub {
     my $orig = $0;
+    local $ENV{T2_HARNESS_PROC_PREFIX};
 
     set_procname(set => ['test-worker']);
     like($0, qr/Test2-Harness/, "default prefix applied");

t/unit/Test2/Harness/Reloader/Inotify2.t

@@ -8,14 +8,14 @@ subtest isa => sub {
 };
 
 subtest construction => sub {
-    my $r = CLASS->new(stage_name => 'inotify_test');
+    my $r = CLASS->new(stage => 'inotify_test');
     ok($r, "constructed");
     is($r->stage_name, 'inotify_test', "stage_name accessor");
     is($r->watcher, undef, "watcher is undef before start");
 };
 
 subtest changed_files_requires_start => sub {
-    my $r = CLASS->new(stage_name => 'test');
+    my $r = CLASS->new(stage => 'test');
 
     like(
         dies { $r->changed_files },
@@ -25,22 +25,22 @@ subtest changed_files_requires_start => sub {
 };
 
 subtest start_sets_watcher => sub {
-    my $r = CLASS->new(stage_name => 'test');
+    my $r = CLASS->new(stage => 'test');
     $r->start;
     ok($r->watcher, "watcher set after start");
     ok($r->watcher->isa('Linux::Inotify2'), "watcher is a Linux::Inotify2 instance");
     $r->stop;
 };
 
 subtest stop_clears_watcher => sub {
-    my $r = CLASS->new(stage_name => 'test');
+    my $r = CLASS->new(stage => 'test');
     $r->start;
     $r->stop;
     is($r->watcher, undef, "watcher cleared after stop");
 };
 
 subtest changed_files_returns_arrayref => sub {
-    my $r = CLASS->new(stage_name => 'test');
+    my $r = CLASS->new(stage => 'test');
     $r->start;
     my $changed = $r->changed_files;
     ok(ref($changed) eq 'ARRAY', "changed_files returns an arrayref");