chore(core): stage 1 contracts — dialog, API schemas + fixtures, integrations, monitoring, modules

Freeze interfaces between lanes A (bot), B (backend), C (dashboard) so three developers work in
parallel without touching each other's files: dialog Event/Reply + engine registry with echo stub,
integration protocols with in-memory defaults, MonitoringService with noop stub, /api/v1 schemas
with fixture-backed routes, frozen main.py wiring, config/modules.yaml + due_scales(), DAR-5,
tzdata, Andrey trajectory, lanes in WORKFLOW, ADR-010.

Refs #34

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

app/llm/mock.py

@@ -107,9 +107,7 @@ def _extract_item(scale_item_id: str, max_score: int, answer: str) -> ItemScore:
     for fraction, cues in _SEVERITY_CUES:
         hit = _any(cues, text)
         if hit:
-            return ItemScore(
-                item=scale_item_id, score=round(fraction * max_score), confidence=0.8, evidence=hit
-            )
+            return ItemScore(item=scale_item_id, score=round(fraction * max_score), confidence=0.8, evidence=hit)
     # No frequency/intensity cue -> low confidence, the gateway turns it into a clarifying question.
     return ItemScore(item=scale_item_id, score=0, confidence=0.3, evidence="")