feat(integrations): demo adapters for МИС, connect-code identity, ГРЛС excerpts, doctor notifier

- setup() at package import (idempotent, replaces only base.py defaults): MisMock, ConnectCodeIdentity,
  GrlsExcerpts, CompositeNotifier; outbox stays MemoryOutbox
- MisMock: clinical DB prescriptions, fallback data/meds/mis_prescriptions.json (synthetic, by token)
- ConnectCodeIdentity: one-time connect code via identity_repo, 15 min grace for the double check in one
  connect flow (Telegram /start + engine `new` state)
- GrlsExcerpts: synthetic paraphrased instruction excerpts for sertraline, paroxetine, escitalopram,
  fluoxetine, mirtazapine, prazosin
- CompositeNotifier: in-memory feed (recent(since_id)) + Telegram doctor chat, PII-free, never raises
- test_llm_med_qa: default-registry test now patches NoDrugInfo explicitly

Refs #14

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

tests/test_llm_med_qa.py

@@ -3,7 +3,7 @@
 import pytest
 
 from app.core.types import ScrubbedText
-from app.integrations.base import DrugSection
+from app.integrations.base import DrugSection, NoDrugInfo, integrations
 from app.llm import med_qa as med_qa_module
 from app.llm.gateway import LLMGateway, is_forbidden
 from app.llm.med_qa import MedAnswer, adds_content, detect_topic, fallback_text, med_qa, select_excerpt
@@ -173,8 +173,9 @@ async def test_unknown_drug_and_unknown_topic(info: FakeDrugInfo, mock_gateway:
     assert await med_qa("сертралин", S("какая погода"), drug_info=info) is None
 
 
-async def test_default_registry_has_no_data(mock_gateway: None) -> None:
-    # Before lane B (#14) registers real excerpts the default NoDrugInfo returns nothing.
+async def test_empty_registry_has_no_data(mock_gateway: None, monkeypatch: pytest.MonkeyPatch) -> None:
+    # Without excerpts (base.py default NoDrugInfo; #14 registers real ones at import) nothing is answered.
+    monkeypatch.setattr(integrations, "drug_info", NoDrugInfo())
     assert await med_qa("сертралин", S("тошнит")) is None