Updated openclaw-container to OpenClaw 2026.2.23 and stabilized local development configuration.

Bumped container OpenClaw version to 2026.2.23.

Tracked upstream v2026.2.23 improvements: Kilo provider support, Vercel model reference normalization, and stronger SSRF/trusted-network defaults.

Fixed local startup/runtime behavior via openclaw-start.sh and openclaw.json updates.