Clean

docs/PHASE_7_7_RENDER_CADENCE_PLAYOUT_DESIGN.md

@@ -372,18 +372,18 @@ DeckLink output should not start consuming before the render cadence has prepare
 
 Initial behavior:
 
-- configure DeckLink output without starting scheduled playback
-- start the render cadence producer
-- render warmup frames at the selected cadence, not faster
-- wait until completed-frame depth reaches `targetWarmupFrames`
-- schedule those completed frames as DeckLink preroll
-- call `StartScheduledPlayback()`
+- [x] configure DeckLink output without starting scheduled playback
+- [x] start the render cadence producer
+- [x] render warmup frames at the selected cadence, not faster
+- [x] wait until scheduled preroll reaches `targetPrerollFrames`
+- [x] schedule completed system-memory frames as DeckLink preroll
+- [x] call `StartScheduledPlayback()`
 
 Exit criteria:
 
-- startup does not require the render producer to catch up by rendering faster than cadence
-- DeckLink begins playback with a real completed-frame buffer
-- if warmup cannot fill within a bounded timeout, startup enters degraded state with telemetry
+- [x] startup does not require the render producer to catch up by rendering faster than cadence
+- [x] DeckLink begins playback with a real rendered preroll buffer
+- [x] if warmup cannot fill within a bounded timeout, startup enters degraded state with telemetry
 
 ### Step 5: Make DeckLink Scheduler A Separate Top-Up Loop