Fix engram_compile: fetch pinned nodes directly when vector search empty

Replace scan-by-offset fallback with engram_get_node_json calls for the
known high-salience identity nodes (family, origin). Offset-based scanning
is order-dependent and unreliable; direct ID fetch is stable regardless of
snapshot position. Ensures biographical context (Fox, Bobby, etc.) is
always in the system prompt when vector search returns nothing.

dist/soul.c

@@ -35,6 +35,7 @@ el_val_t json_safe(el_val_t s);
 el_val_t build_system_prompt(el_val_t ctx);
 el_val_t hist_append(el_val_t hist, el_val_t role, el_val_t content);
 el_val_t hist_trim(el_val_t hist);
+el_val_t clean_llm_response(el_val_t s);
 el_val_t handle_chat(el_val_t body);
 el_val_t handle_see(el_val_t body);
 el_val_t studio_tools_json(void);
@@ -52,6 +53,10 @@ el_val_t handle_dharma(el_val_t path, el_val_t method, el_val_t body);
 el_val_t handle_tool(el_val_t path, el_val_t method, el_val_t body);
 el_val_t handle_nlg(el_val_t path, el_val_t method, el_val_t body);
 el_val_t render_studio(void);
+el_val_t elp_extract_topic(el_val_t msg);
+el_val_t elp_detect_predicate(el_val_t msg);
+el_val_t elp_parse(el_val_t msg);
+el_val_t handle_elp_chat(el_val_t body);
 el_val_t strip_query(el_val_t path);
 el_val_t err_404(el_val_t path);
 el_val_t err_405(el_val_t method, el_val_t path);