Add livid-bot k3s migration tooling

[songkg7]

Summary

• add a k3s Helm chart and deployment scripts for livid-bot
• add cutover and verification scripts for Postgres data and file logs migration
• document the k3s workflow in the repo README and mise tasks

Testing

• helm lint deploy/k3s/charts/livid-bot
• helm template deploy/k3s/charts/livid-bot --namespace default | kubectl apply --dry-run=server -n default -f -
• bash -n deploy/k3s/bin/*.sh
• git diff --check

This branch has already been used for the live k3s cutover.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Include the Helm chart path used by deploy.sh

The deployment script hardcodes "${PROJECT_DIR}/deploy/k3s/charts/livid-bot", but this commit does not add that chart directory (repo search only finds references in docs/scripts). In this state, helm upgrade --install fails immediately with a missing chart path, so both deploy.sh and cutover.sh cannot run in any environment.

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