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/core/safety.py

@@ -320,9 +320,7 @@ def _has_affirmed_match(n: _Normalised, rule: _Rule, neg: _NegationCfg) -> bool:
 # ---------------------------------------------------------------------------------------------------------
 
 
-def check(
-    text: ScrubbedText, llm_signal: RiskLevel | None = None, *, lexicon: Lexicon | None = None
-) -> SafetyResult:
+def check(text: ScrubbedText, llm_signal: RiskLevel | None = None, *, lexicon: Lexicon | None = None) -> SafetyResult:
     """Classify crisis risk of one message. Deterministic; the LLM signal can only raise the level."""
     lex = lexicon or _default_lexicon()
     n = _normalise(text)
@@ -405,9 +403,7 @@ def _render(body: str, resources: list[CrisisResource], doctor_notified: str, gr
     return "\n".join(lines)
 
 
-def crisis_reply(
-    categories: list[str], audience: Audience = "patient", *, path: Path = CRISIS_PATH
-) -> CrisisScript:
+def crisis_reply(categories: list[str], audience: Audience = "patient", *, path: Path = CRISIS_PATH) -> CrisisScript:
     """Fixed crisis script for an ACUTE result. Never generated by the LLM."""
     cfg = _crisis_cfg(path)
     variant = f"{audience}.default"