fix: Remove t.Parallel() from time-sensitive TestFormatRelativeTime subtests

The subtests depend on time.Now() being consistent between test setup and
execution. Running them in parallel causes timing drift that breaks the
"less than one second" test case.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: cv

internal/cli/status_test.go

@@ -1261,7 +1261,6 @@ func TestFormatRelativeTime(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			result := formatRelativeTime(tt.time)
 			assert.Equal(t, tt.expected, result)
 		})