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>

uv.lock

@@ -1088,6 +1088,7 @@ dependencies = [
     { name = "qrcode", extra = ["pil"] },
     { name = "sqlalchemy", extra = ["asyncio"] },
     { name = "streamlit" },
+    { name = "tzdata" },
     { name = "uvicorn", extra = ["standard"] },
 ]
 
@@ -1115,6 +1116,7 @@ requires-dist = [
     { name = "qrcode", extras = ["pil"], specifier = ">=7.4" },
     { name = "sqlalchemy", extras = ["asyncio"], specifier = ">=2.0" },
     { name = "streamlit", specifier = ">=1.38" },
+    { name = "tzdata", specifier = ">=2026.5" },
     { name = "uvicorn", extras = ["standard"], specifier = ">=0.30" },
 ]