add screen mode

migrations/20260910150000_add_screen_playback_state.sql

@@ -0,0 +1,11 @@
+-- +goose Up
+ALTER TABLE screen_sessions
+    ADD COLUMN IF NOT EXISTS mode INTEGER NOT NULL DEFAULT 1,
+    ADD COLUMN IF NOT EXISTS state_version BIGINT NOT NULL DEFAULT 1,
+    ADD COLUMN IF NOT EXISTS position_ms BIGINT NOT NULL DEFAULT 0;
+
+-- +goose Down
+ALTER TABLE screen_sessions
+    DROP COLUMN IF EXISTS position_ms,
+    DROP COLUMN IF EXISTS state_version,
+    DROP COLUMN IF EXISTS mode;