Switch to pre-built kiro-rs Docker image (ghcr.io/hank9999/kiro-rs:beta-7d4d74)

fix: Use Rust 1.86 for edition2024

Switch to kiro-rs (Rust) - build from source

fix: Simplify Dockerfile, skip TLS sidecar, explicit port 7860

feat: Deploy aiclient-2-api to HuggingFace Space