buzz/schema/tables/public/community_bans.sql

-- ── Bans + timeouts (one restriction row per member) ──────────────────────────
-- Ban = connection block, enforced at the NIP-42 auth seam
-- ("blocked: you are banned from this community") + join/ingest surfaces.
-- Timeout = write-block only ("restricted: you are timed out until <ts>").
-- A row may be ban-only, timeout-only, or both over its lifetime.

CREATE TABLE community_bans (
    community_id    UUID NOT NULL REFERENCES communities(id),
    pubkey          BYTEA NOT NULL CHECK (length(pubkey) = 32),
    banned          BOOLEAN NOT NULL DEFAULT false,
    -- NULL + banned=true ⇒ permanent.
    ban_expires_at  TIMESTAMPTZ,
    ban_reason      TEXT,
    -- Write-block until this timestamp; NULL or past ⇒ not timed out.
    muted_until     TIMESTAMPTZ,
    mute_reason     TEXT,
    -- Moderator who last modified this row.
    actor_pubkey    BYTEA NOT NULL CHECK (length(actor_pubkey) = 32),
    created_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at      TIMESTAMPTZ NOT NULL DEFAULT now(),
    PRIMARY KEY (community_id, pubkey)
);