feat(playout): replace time-based R2 retention with run-count and size caps

.github/instructions/TODO.md

@@ -2,10 +2,6 @@
 
 > Completed tasks moved to [DONE](./DONE.md). Remaining tasks in [BACKLOG](./BACKLOG.md).
 
-## R2 Data Retention
-
-- [ ] Adjust internal data retention for R2: remove folders /hls/r-{ISOTIME} after next run, keep only the last 2 runs or max. 10GB of data
-
 ## Frontend Tests
 
 ### User Frontend