Add communication guide and project improvements documentation; enhance main app with logging, CORS configuration, and health check endpoints; implement input validation and error handling in routers; improve services with rate limiting and snapshot persistence; update models for SQLAlchemy best practices; create index.html for frontend interaction.

app/models.py

@@ -1,5 +1,4 @@
-from sqlalchemy import Column, String, DateTime, Boolean, Integer, Text
-from datetime import datetime
+from sqlalchemy import Column, String, DateTime, Boolean, Integer, Text, func
 from app.database import Base
 
 
@@ -11,6 +10,7 @@ class NL43Config(Base):
     __tablename__ = "nl43_config"
 
     unit_id = Column(String, primary_key=True, index=True)
+    host = Column(String, default="127.0.0.1")
     tcp_port = Column(Integer, default=80)  # NL43 TCP control port (via RX55)
     tcp_enabled = Column(Boolean, default=True)
     ftp_enabled = Column(Boolean, default=False)
@@ -25,7 +25,7 @@ class NL43Status(Base):
     __tablename__ = "nl43_status"
 
     unit_id = Column(String, primary_key=True, index=True)
-    last_seen = Column(DateTime, default=datetime.utcnow)
+    last_seen = Column(DateTime, default=func.now())
     measurement_state = Column(String, default="unknown")  # Measure/Stop
     lp = Column(String, nullable=True)
     leq = Column(String, nullable=True)