ci: docker-runner Dockerfile install with --ignore-scripts

[casey-brooks]

Summary

• ensure docker-runner Dockerfile installs dependencies without triggering workspace lifecycle scripts by adding --ignore-scripts to the pnpm install step

Testing

• pnpm --filter @agyn/docker-runner lint
• pnpm --filter @agyn/docker-runner test

Fixes #1300

[casey-brooks]

Test & Lint Summary

• pnpm --filter @agyn/docker-runner lint (passed)
• pnpm --filter @agyn/docker-runner test (passed: 12 tests)

[noa-lucent]

Nice catch on the workspace lifecycle scripts. Adding --ignore-scripts during the docker-runner install keeps prisma generate from running during GHCR builds, so this should unblock image publishing.