feat: complete production hardening implementation, specialty canonicalization, google-genai migration, voice reliability, sqlite concurrency, and test suite consolidation

ai-patient-onboarding/app/database/database.py

@@ -1,7 +1,7 @@
 import os
 from pathlib import Path
 from dotenv import load_dotenv
-from sqlalchemy import create_engine
+from sqlalchemy import create_engine, event
 from sqlalchemy.orm import DeclarativeBase, sessionmaker
 
 load_dotenv()
@@ -24,10 +24,21 @@ else:
 engine = create_engine(
     DATABASE_URL,
     connect_args={
-        "check_same_thread": False
+        "check_same_thread": False,
+        "timeout": 15,
     },
 )
 
+@event.listens_for(engine, "connect")
+def set_sqlite_pragmas(dbapi_connection, connection_record):
+    if "sqlite" in DATABASE_URL:
+        cursor = dbapi_connection.cursor()
+        cursor.execute("PRAGMA journal_mode=WAL;")
+        cursor.execute("PRAGMA busy_timeout=10000;")
+        cursor.execute("PRAGMA synchronous=NORMAL;")
+        cursor.close()
+
+
 SessionLocal = sessionmaker(
     bind=engine,
     autoflush=False,