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>

app/integrations/__init__.py

@@ -0,0 +1,51 @@
+"""Demo adapters behind the frozen integration Protocols (SPEC §9, #14).
+
+`setup()` runs when the package is first imported. Every consumer imports `app.integrations.base`, which
+initialises this package first, and `app/main.py` is a frozen contract — so the registry is wired before
+any request or job without a startup hook. Setup only constructs objects: data files and DB sessions are
+opened lazily on the first call, so importing the package never fails on I/O.
+
+Registry after setup:
+- `prescriptions` — `MisMock`: clinical DB `prescriptions`, then `data/meds/mis_prescriptions.json`;
+- `identity` — `ConnectCodeIdentity`: one-time connect code from the doctor (ЕСИА stand-in);
+- `drug_info` — `GrlsExcerpts`: `data/meds/grls/*.yaml`;
+- `notifier` — `CompositeNotifier`: in-memory dashboard feed + optional Telegram doctor chat;
+- `outbox` — unchanged `MemoryOutbox` (the web console drains it; the Telegram channel wraps it at start).
+"""
+
+from app.integrations.base import (
+    EmptyPrescriptions,
+    MemoryNotifier,
+    NoDrugInfo,
+    RejectIdentity,
+    integrations,
+)
+from app.integrations.connect_code import ConnectCodeIdentity
+from app.integrations.grls import GrlsExcerpts
+from app.integrations.mis_mock import MisMock
+from app.integrations.notify import CompositeNotifier, NotificationFeed
+
+__all__ = ["CompositeNotifier", "ConnectCodeIdentity", "GrlsExcerpts", "MisMock", "NotificationFeed", "setup"]
+
+_done = False
+
+
+def setup(*, force: bool = False) -> None:
+    """Register the demo adapters. Idempotent; never replaces an adapter someone already swapped in
+    (a test fake, the Telegram outbox), only the in-memory defaults from `base.py` — unless `force`."""
+    global _done
+    if _done and not force:
+        return
+    if force or isinstance(integrations.prescriptions, EmptyPrescriptions):
+        integrations.prescriptions = MisMock()
+    if force or isinstance(integrations.identity, RejectIdentity):
+        integrations.identity = ConnectCodeIdentity()
+    if force or isinstance(integrations.drug_info, NoDrugInfo):
+        integrations.drug_info = GrlsExcerpts()
+    # Exact type check: MemoryNotifier subclasses used as test sinks must stay in place.
+    if force or type(integrations.notifier) is MemoryNotifier:
+        integrations.notifier = CompositeNotifier()
+    _done = True
+
+
+setup()