Ultra-Sharp Large Print Photo Upscale

I need to turn a single, fairly low-quality photograph into an ultra-high-resolution image that will hold up flawlessly when printed at 100 × 100 cm. The shot is for my personal collection, so authenticity matters just as much as sheer sharpness: all features need to look crisp, detailed and free of artefacts.

You are free to lean on any combination of AI upscaling, manual retouching in Photoshop, Topaz Gigapixel AI, or similar tools, as long as the final result is clean, noise-controlled and studio-level.

Deliverables
• Print-ready file (JPG) at 300 dpi for 100 × 100 cm

If you can make a small preview first, even better. Photo attached