PRD 0019 chunk 1. New `discover_active_agents()` in dashboard.py
returns one `ActiveAgent(slug, agent_name, started_at, services)`
per currently-running compose project:
- Slugs come from `list_active_slugs()` (chunk-5 shared helper).
- The service set per project comes from ONE label-filtered
`docker ps` call (PRD open question #1: avoids N per-bottle
`compose ps` invocations on each 1s refresh tick).
- agent_name + started_at come from each bottle's
metadata.json; "?" / "" fallbacks when the file is missing
so the row renders rather than vanishes.
Not wired into the TUI yet — chunk 2 renders the agents pane.
The parser (`_parse_services_by_project`) is split out as a pure
function so the conditional-input shape can be unit-tested
without docker.
didericis
6e4a9f606f