chore: replace em dashes with hyphens, add no-em-dash rule to CLAUDE.md

internal/winexec/encode.go

@@ -1,7 +1,7 @@
 // Package winexec runs PowerShell on Windows hosts.
 //
-// It exists because three subsystems — updates, workload collection and
-// workload logs — all need the same invocation, and because getting a
+// It exists because three subsystems - updates, workload collection and
+// workload logs - all need the same invocation, and because getting a
 // multi-line script past Go quoting, cmd.exe quoting and PowerShell's own
 // parser is a problem worth solving once.
 package winexec