Changeset 0.24.3 (#159)

server/database/migrations/021_sessions.sql

@@ -0,0 +1,24 @@
+-- 021_sessions.sql
+-- Anonymous / session participants for workflow channels (v0.24.3)
+
+CREATE TABLE IF NOT EXISTS session_participants (
+    id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    session_token TEXT NOT NULL UNIQUE,
+    channel_id    UUID NOT NULL REFERENCES channels(id) ON DELETE CASCADE,
+    display_name  TEXT NOT NULL DEFAULT 'Visitor',
+    fingerprint   TEXT,
+    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_session_participants_channel
+    ON session_participants(channel_id);
+
+CREATE INDEX IF NOT EXISTS idx_session_participants_token
+    ON session_participants(session_token);
+
+COMMENT ON TABLE session_participants IS 'Ephemeral identities for anonymous workflow channel visitors.';
+
+-- Allow channels to opt in to anonymous session access.
+ALTER TABLE channels ADD COLUMN IF NOT EXISTS allow_anonymous BOOLEAN NOT NULL DEFAULT FALSE;
+
+COMMENT ON COLUMN channels.allow_anonymous IS 'When true, unauthenticated visitors can join via session token (workflow channels only).';