Replaces gopkg.in/yaml.v3 with github.com/BurntSushi/toml. Updates
struct tags, default config path, Dockerfile CMD, README, and ships
config.example.toml in place of the YAML example. ${ENV_VAR}
expansion still runs on the raw file before parsing, so the behavior
is unchanged.
Multi-stage alpine Dockerfile builds with -tags goolm so libolm isn't
needed at runtime. Annotated config.example.yaml documents every field
and shows ${ENV_VAR} usage for secrets. README is rewritten for the Go
bot — Python-era web-portal docs are gone.
If the env var is unset, a random key is generated at startup. This
removes a manual setup step. The README and .env.example are updated
to reflect that the variable is now optional (but recommended in
production for session persistence across restarts).
https://claude.ai/code/session_018iMt5qm4j9bk8wzytLC3E6
