feat(07-02): update main.py to use new YAML config loader

- Replace os.environ calls with get_config()
- Use configuration for CORS and network settings
- Remove direct dotenv/inventory.env references

backend/main.py

@@ -1,6 +1,6 @@
 import os
 from ipaddress import ip_address, ip_network, AddressValueError
-from . import config_loader  # This triggers the automatic environment loading
+from .config_loader import get_config
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.staticfiles import StaticFiles
@@ -25,18 +25,20 @@ app = FastAPI(title="TFM aInventory API", version="1.1.0")
 log.info("TFM aInventory API process started.")
 
 # [SECURITY FIX M-01] CORS Configuration with Subnet Support
-# We dynamically build allowed origins from environment variables to simplify deployment.
-_raw_origins = os.environ.get("ALLOWED_ORIGINS", "")
+# We dynamically build allowed origins from configuration to simplify deployment.
+config = get_config()
+app_config = config.get("application", {})
+_raw_origins = app_config.get("cors_origins", "")
 ALLOWED_ORIGINS = [o.strip() for o in _raw_origins.split(",") if o.strip()]
 
 # Allowed subnets for subnet-based CORS validation (e.g., VPN, Tailscale)
 ALLOWED_SUBNETS = []
 
-# Automatically add origins based on network_config.env variables if present
-server_ip = os.environ.get("SERVER_IP")
-front_port = os.environ.get("FRONTEND_PORT", "8917")
-front_ssl_port = os.environ.get("FRONTEND_SSL_PORT", "8919")
-back_ssl_port = os.environ.get("BACKEND_SSL_PORT", "8918")
+# Automatically add origins based on network config if present
+server_ip = app_config.get("server_ip")
+front_port = app_config.get("frontend_port", "8917")
+front_ssl_port = app_config.get("frontend_ssl_port", "8919")
+back_ssl_port = app_config.get("backend_ssl_port", "8918")
 
 # Always allow localhost
 defaults = [
@@ -60,7 +62,7 @@ if server_ip and server_ip != "localhost":
             ALLOWED_ORIGINS.append(ip_o)
 
 # [NEW] Add Extra Allowed Origins (Tailscale, VPN, etc.) with Subnet Support
-extra_origins_raw = os.environ.get("EXTRA_ALLOWED_ORIGINS", "")
+extra_origins_raw = app_config.get("cors_origins", "")
 if extra_origins_raw:
     for extra_item in [o.strip() for o in extra_origins_raw.split(",") if o.strip()]:
         # Check if it's a subnet (contains /) or individual IP