feat(500): reply shapes are delivered - the core every turn through the ledger, each slice at its moment, reply mounts before the reply (#5495)

- Every turn (/api/plugin/retrieve, UserPromptSubmit): the core reply shape
  leads the payload - in full the first time, as its one-line reminder
  after that - followed by whatever is mounted on reply.report, under the
  shared rule ledger. Fresh keys come back as shape_keys.
- The ledger is <sid>.shapes.ids in scribe-priorart (scribe_shapes_file /
  _seen / _append), so the compaction sweep that clears every .ids ledger
  is what brings the full core back after one.
- At a moment (/api/plugin/moment): the slice for that reply - completion
  on work.finish, asks on reply.ask, plan on work.plan - ahead of the
  mounted rules. reachable_tools now lists tools reaching a shaped moment
  even on an install with nothing mounted.
- Scribe's own tools (attach_moment_rules): reply_shape in the response,
  in full, since that door has no ledger. enter_project carries the core
  for clients with no prompt hook.
- Telemetry: one AppLog row per delivery (plugin / reply_shape), each
  shape with full or pointer and the door (turn, hook, mcp).

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

plugin/hooks/scribe_moment.sh

@@ -122,6 +122,11 @@ ledger_q=""
 rule_seen=$(scribe_rules_live "$rulefile")
 [ -n "$rule_seen" ] && ledger_q="&exclude_rule_ids=${rule_seen}"
 ledger_q="${ledger_q}$(scribe_held_query "$state_dir/${safe_sid}.opened.ids")"
+# The reply-shape ledger (milestone 500): a shape this session already holds in
+# full comes back as its reminder.
+shapefile=$(scribe_shapes_file "$safe_sid")
+shapes_seen=$(scribe_shapes_seen "$shapefile")
+[ -n "$shapes_seen" ] && ledger_q="${ledger_q}&shapes_seen=${shapes_seen}"
 
 # The event whole, since which field a mapping matches is the mapping's
 # business. A write of a very large file is reduced to its name: the moments a
@@ -141,6 +146,7 @@ body=$(printf '%s' "$event" | curl -fsS --max-time 3 \
 
 body_flat=$(printf '%s' "$body" | scribe_json_flat)
 scribe_json_list "$body_flat" '.rule_ids' | scribe_rules_append "$rulefile"
+scribe_json_list "$body_flat" '.shape_keys' | scribe_shapes_append "$shapefile"
 
 context=$(scribe_json_pick "$body_flat" '.context')
 [ -n "$context" ] || exit 0