elp(dialogue+self_region): native-el summon-through-self port + scratch-verified gate

Ports dialogue.py + self_region.py to native el, bound to the IN-PROCESS engram
el runtime (engram_activate_json / engram_neighbors_json / engram_search_json /
engram_node_full / engram_connect — C-order builtins, not the wrapper order).

self_region.el: pulls the engram's REAL Self/identity nodes (pooled single-term
search), scores by self-signal, reads out identity from their own prose — no
hardcoded anchors, no template.

dialogue.el: ONE operation — project(query) -> land on a region -> read out.
  * identity = self-region proximity (no intent classifier, no separate branch)
  * memory = activation + a RELEVANCE FLOOR, then MATERIALIZE by walking the
    neighborhood (real edges), never top-props
  * HONEST ABSENCE when nothing is close — no 'I noted that' echo, no fabrication
  * NEGATION SACRED: readout is the stored prose verbatim, so polarity survives
  * DIRECTIVE OVERRIDE: a meta-directive switches the reply language

Verified against a SCRATCH in-process engram (live :8742 untouched): dialogue
gate 9/9 — identity from real self-content, neighborhood materialization,
SACRED negation (self + memory), PT identity in PT, directive override to
English, 'Prove it' -> honest absence. EN/Romance/prop/multilingual gates
unregressed.

elp/manifest.el

@@ -83,6 +83,8 @@ build {
         "src/comprehend.el",
         "src/propositions.el",
         "src/multilingual.el",
+        "src/self_region.el",
+        "src/dialogue.el",
         "src/elp.el",
     ]
 }