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

internal/sync/packages.go

@@ -15,7 +15,7 @@ import (
 )
 
 // collectPackagesFlag is written by the 30s key poll and read by the hourly
-// package loop — two different goroutines, hence the atomic.
+// package loop - two different goroutines, hence the atomic.
 //
 // It defaults to false, so an agent that has not yet completed a poll, or is
 // talking to a server too old to send the field, collects nothing. Off is the
@@ -27,7 +27,7 @@ var collectPackagesFlag atomic.Bool
 //
 // Without it the boot-time package report loses a race it can only lose: the
 // hourly loop starts before the first poll, reads a flag that is still false by
-// construction, and skips — so a freshly installed agent reports no packages for
+// construction, and skips - so a freshly installed agent reports no packages for
 // an hour and the server shows nothing to scan.
 // How long the boot package report waits for that first poll. Two poll
 // intervals plus slack: long enough to cover one failed attempt, short enough
@@ -43,7 +43,7 @@ func markFirstPoll() { firstPollOnce.Do(func() { close(firstPoll) }) }
 
 // waitFirstPoll blocks until the flag is known, or gives up. The wait is
 // bounded because this loop also reports OS updates, which do not depend on the
-// flag at all — a control plane that cannot be polled must not silence those too.
+// flag at all - a control plane that cannot be polled must not silence those too.
 func waitFirstPoll(ctx context.Context, limit time.Duration) {
 	t := time.NewTimer(limit)
 	defer t.Stop()