Onyscribe Admin: Initialer Stand

Admin-Plattform für die Tenants von Onyscribe: Editor mit Live-Vorschau (echter Core in Sandbox), Versionen, KI-Agent (Cortecs),
OIDC-Abgleich über die Login-Developer-API, Deploy-Engine (Mittwald, gesperrt ohne DEPLOY_LIVE, Freigabe pro Tenant),
Core-Vertrag (Schema/Manifest), Core-Releases mit Kompatibilitätsprüfung, Canary-Rollout und Rollback, Zustandsabgleich.
Runbook: docs/RUNBOOK_PARALLELTEST.md

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

app/db.py

@@ -0,0 +1,42 @@
+from __future__ import annotations
+
+from contextlib import contextmanager
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import DeclarativeBase, sessionmaker
+
+from app.settings import DATABASE_URL
+
+_kwargs = {"connect_args": {"check_same_thread": False}} if DATABASE_URL.startswith("sqlite") else {"pool_pre_ping": True}
+engine = create_engine(DATABASE_URL, **_kwargs)
+SessionLocal = sessionmaker(bind=engine, expire_on_commit=False, autoflush=True)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+def init_db() -> None:
+    from app import models  # noqa: F401
+    Base.metadata.create_all(engine)
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+@contextmanager
+def session():
+    db = SessionLocal()
+    try:
+        yield db
+        db.commit()
+    except Exception:
+        db.rollback()
+        raise
+    finally:
+        db.close()