self-review 2026-07-30: auto_term stopword filter, real idle_ms, bounded beginSession

- awareness.el: curiosity auto_term was the raw first word of a WM
  label with no term-quality scoring — observed seeds included What,
  Colon, Prose, Context. Replaced the 7-word genre blocklist whack-a-
  mole with a delimited stopword membership test (function words +
  document-structure words); topical terms pass untouched. Verified
  live: seeds now ReasonEdit, Reasoning-model, Self-review.
- routes.el + awareness.el: idle counter only reset on rare inbox
  synthesis-requests, so idle==pulse always (zero information).
  handle_request now stamps soul.last_activity_ts on every inbound
  HTTP request; heartbeat emits idle_ms = ms since last request
  (-1 until first request of a boot).
- neuron-api.el: beginSession concatenated a depth-2 spread plus the
  unbounded self-hub neighbor dump — multi-MB response, doubled by
  wrapper re-escaping, socket died on every call. Now depth-1 and
  the hub dump dropped (identity loading has its own tool). Verified:
  beginSession returns instead of closing the socket.

dist/elp-c-decls.h

@@ -131,6 +131,7 @@ el_val_t auto_term_try_slot(el_val_t slot_type, el_val_t slot_lbl);
 el_val_t awareness_run(void);
 el_val_t axon_get(el_val_t path);
 el_val_t axon_post(el_val_t path, el_val_t body);
+el_val_t bounded_persona_floor(void);
 el_val_t bridge_save(el_val_t session_id, el_val_t model, el_val_t safe_sys, el_val_t tools_json, el_val_t messages, el_val_t tools_log, el_val_t tool_use_id);
 el_val_t build_form_from_json(el_val_t semantic_form_json, el_val_t lang_code);
 el_val_t build_np(el_val_t referent, el_val_t slots);
@@ -820,6 +821,8 @@ el_val_t mem_save(el_val_t path);
 el_val_t mem_search(el_val_t query, el_val_t limit);
 el_val_t mem_store(el_val_t content, el_val_t label, el_val_t tags);
 el_val_t mem_strengthen(el_val_t node_id);
+el_val_t mem_tombstone(el_val_t node_id);
+el_val_t memory_hide_tombstoned(el_val_t raw, el_val_t path);
 el_val_t morph_apply_suffix(el_val_t base, el_val_t suffix);
 el_val_t morph_conjugate(el_val_t verb, el_val_t tense, el_val_t person, el_val_t number, el_val_t profile);
 el_val_t morph_inflect(el_val_t word, el_val_t features, el_val_t profile);
@@ -1151,6 +1154,8 @@ el_val_t threat_trajectory_check(el_val_t tool_name, el_val_t tool_input);
 el_val_t tier_canonical(void);
 el_val_t tier_episodic(void);
 el_val_t tier_working(void);
+el_val_t tombstone_node(el_val_t id);
+el_val_t tombstoned_id_set(void);
 el_val_t tool_auto_approved(el_val_t tool_name);
 el_val_t txb_conjugate(el_val_t verb, el_val_t tense, el_val_t person, el_val_t number);
 el_val_t txb_decline(el_val_t noun, el_val_t gram_case, el_val_t number);