Implement bootloader version checking for OTA updates

Co-authored-by: netmindz <442066+netmindz@users.noreply.github.com>

tools/add_bootloader_metadata.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+"""
+Simple script to add bootloader requirement metadata to WLED binary files.
+This adds a metadata tag that the OTA handler can detect.
+
+Usage: python add_bootloader_metadata.py <binary_file> <required_version>
+Example: python add_bootloader_metadata.py firmware.bin 4
+"""
+
+import sys
+import os
+
+def add_bootloader_metadata(binary_file, required_version):
+    """Add bootloader metadata to a binary file"""
+    if not os.path.exists(binary_file):
+        print(f"Error: File {binary_file} does not exist")
+        return False
+    
+    # Validate version
+    try:
+        version = int(required_version)
+        if version < 1 or version > 9:
+            print("Error: Bootloader version must be between 1 and 9")
+            return False
+    except ValueError:
+        print("Error: Bootloader version must be a number")
+        return False
+    
+    # Create metadata string
+    metadata = f"WLED_BOOTLOADER:{version}"
+    
+    # Append metadata to file
+    try:
+        with open(binary_file, 'ab') as f:
+            f.write(metadata.encode('ascii'))
+        print(f"Successfully added bootloader v{version} requirement to {binary_file}")
+        return True
+    except Exception as e:
+        print(f"Error writing to file: {e}")
+        return False
+
+def main():
+    if len(sys.argv) != 3:
+        print("Usage: python add_bootloader_metadata.py <binary_file> <required_version>")
+        print("Example: python add_bootloader_metadata.py firmware.bin 4")
+        sys.exit(1)
+    
+    binary_file = sys.argv[1]
+    required_version = sys.argv[2]
+    
+    if add_bootloader_metadata(binary_file, required_version):
+        sys.exit(0)
+    else:
+        sys.exit(1)
+
+if __name__ == "__main__":
+    main()