I'm looking for a skilled handyman to diagnose and fix a faulty door lock. The front door lock sometimes sticks, and the key occasionally won't turn smoothly. I suspect worn pins or a misaligned strike plate. Ideally, the chosen pro can inspect, lubricate, and replace parts if needed, and ensure the door closes securely. Please include a quick safety check for any security vulnerabilities. Availability this week would be great, with a clear estimate of parts and labour before starting.