`cargo run --bin setup -- did` adds #atproto_label and #atproto_labeler to the
DID document via the PDS-signed PLC flow, prompting for the main password and
the emailed code. Splits setup into declare/did modules.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Users DM @cities.pds.cosocial.ca their city and get a signed account label.
Serves com.atproto.label.queryLabels and subscribeLabels, built on jacquard.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>