Add log cleanup function (15-day deletion) and archive documentation

- Added cleanup_old_logs() function to app_v3_simplified.py
- Deletes log.txt if older than 15 days at app startup
- Sends notification to monitoring server when cleanup occurs
- Archived all legacy modules and documentation to oldcode/
- Updated device_info.txt with correct IP (192.168.1.104)
- All changes validated and tested

oldcode/device_module.py

@@ -0,0 +1,53 @@
+"""
+Device information management
+Handles hostname and IP address of the device
+Uses file-based configuration for reliability
+"""
+
+import os
+from config_settings import DEVICE_INFO_FILE
+
+
+def get_device_info():
+    """
+    Get device hostname and IP from configuration file
+    Returns tuple: (hostname, device_ip)
+    
+    The hostname and IP are read from device_info.txt which should be
+    configured with the device's own hostname and IP address.
+    """
+    hostname = None
+    device_ip = None
+    
+    # Load device info from file (primary method - no socket resolution)
+    try:
+        os.makedirs(os.path.dirname(DEVICE_INFO_FILE), exist_ok=True)
+        with open(DEVICE_INFO_FILE, "r") as f:
+            lines = f.read().strip().split('\n')
+            if len(lines) >= 2:
+                hostname = lines[0].strip()
+                device_ip = lines[1].strip()
+                print(f"Device Info - Hostname: {hostname}, IP: {device_ip}")
+                return hostname, device_ip
+            else:
+                print(f"Warning: {DEVICE_INFO_FILE} exists but lacks valid data")
+    except FileNotFoundError:
+        print(f"Device info file not found at {DEVICE_INFO_FILE}")
+    except Exception as e:
+        print(f"Error reading device info file: {e}")
+    
+    # Fallback if file doesn't exist or has issues
+    print("Using default device values")
+    hostname = "prezenta-device"
+    device_ip = "192.168.1.100"
+    
+    # Create file with default values for future use
+    try:
+        os.makedirs(os.path.dirname(DEVICE_INFO_FILE), exist_ok=True)
+        with open(DEVICE_INFO_FILE, "w") as f:
+            f.write(f"{hostname}\n{device_ip}\n")
+        print(f"Created device info file with defaults: {hostname}, {device_ip}")
+    except Exception as e:
+        print(f"Warning: Could not create device info file: {e}")
+    
+    return hostname, device_ip