In-memory AdmissionController (idle/reserved/running, FIFO tickets keyed by
the session cookie, reservation and heartbeat expiry, promotion after
cleanup, EMA wait estimate) behind POST /api/v1/queue/join,
GET /api/v1/queue/status and DELETE /api/v1/queue/ticket. POST /api/v1/query
claims the session's reservation first and joins implicitly when idle.
Settings: CONFLUENCE_WEB_QUEUE_{RESERVATION_SECONDS,HEARTBEAT_SECONDS,MAX_LENGTH}.
The 180 s query cap was enforced independently by the backend clamp, the
agent limits, and the container supervisor. All three now follow
CONFLUENCE_WEB_MAX_DEADLINE_SECONDS (default 900, allowed 60-3600): the
backend passes it into the container at launch, the supervisor reads it and
forwards it to the bridge, and both fall back to 900 s on invalid input. The
query timeout must not exceed it (startup fails otherwise). The supervisor
keeps a separate 180 s guard for a container that never receives a start
frame.
Add assets/book.svg as the tab icon: the backend serves assets/ and the CSP
allows same-origin images (the sanitizer still never emits <img>).
FastAPI app, upstream Confluence/model adapters, authoritative history,
rootless container lifecycle, artifact storage and downloads, fake peers
under backend/dev, tests under tests/backend. Root pytest.ini deselects
the live marker by default; requirements gain the backend dependencies.
