feat: implement Contec patient monitor discovery tool and server framework

config.py

@@ -0,0 +1,45 @@
+import json
+import os
+from pydantic_settings import BaseSettings
+
+class Settings(BaseSettings):
+    hl7_host: str = "0.0.0.0"
+    hl7_port: int = 6060
+    contec_ports: list = [511, 515, 516, 517, 518, 519, 520]
+    monitor_ip: str = ""
+    monitor_model: str = "CMS7000PLUS"
+    device_models: dict = {}
+    target_api_url: str = "https://api.example.com/vitals"
+    api_token: str = ""
+    retry_interval_seconds: int = 60
+    log_file: str = "hl7_forwarder.log"
+    database_url: str = "sqlite:///./hl7_forwarder.db"
+
+    class Config:
+        env_file = ".env"
+
+def get_settings() -> Settings:
+    base_dir = os.path.dirname(os.path.abspath(__file__))
+    config_file = os.path.join(base_dir, "config.json")
+    
+    settings_obj = Settings()
+    
+    if os.path.exists(config_file):
+        with open(config_file, "r") as f:
+            try:
+                data = json.load(f)
+                for k, v in data.items():
+                    setattr(settings_obj, k, v)
+            except json.JSONDecodeError:
+                pass
+
+    if settings_obj.database_url.startswith("sqlite:///./"):
+        db_name = settings_obj.database_url.split("sqlite:///./")[1]
+        settings_obj.database_url = f"sqlite:///{os.path.join(base_dir, db_name)}"
+        
+    if not os.path.isabs(settings_obj.log_file):
+        settings_obj.log_file = os.path.join(base_dir, settings_obj.log_file)
+        
+    return settings_obj
+
+settings = get_settings()