fix(500): the section-hold marker is a ledger by name, so a compaction sweeps it

The marker scribe_reply_check.sh writes after a completion-section hold sat in
the swept ledger directory as `<sid>.reportcheck`, and the sweep matches
`.ids` - test_every_session_file_in_a_swept_directory_follows_the_convention
caught it (run 799). Renamed `<sid>.reportcheck.ids` and added to the roster.
#5496.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

plugin/hooks/scribe_reply_check.sh

@@ -50,7 +50,8 @@ safe_sid=$(printf '%s' "$session_id" | tr -c 'A-Za-z0-9._-' '_')
 rulefile="$state_dir/${safe_sid}.rules.ids"
 stopfile="$state_dir/${safe_sid}.checkpoint.ids"
 # Set when the section check held the reply: the next stop is its rewrite.
-reportfile="$state_dir/${safe_sid}.reportcheck"
+# A ledger by name (`.ids`), so a compaction sweeps it with the rest.
+reportfile="$state_dir/${safe_sid}.reportcheck.ids"
 
 # The rewrite after a hold goes out as written. Only a rewrite of a SECTION
 # hold is sent at all — to record how it came out; one after a rule hold, or