0.2.2

Changed

• Read the deferred ISR request count once inside the existing critical section.
• Use pointer traversal for PERIODIC/DELAYED duplicate and removal searches.
• Complete PARTED by its known active POLL index, preserving ordered compaction
  and multi-translation-unit dispatch.

Added

• DELAYED sorted-prefix cache as the sole implementation: one SRAM byte per
  enabled DELAYED queue, full sorting after compaction, and invalidation on
  half-range deltas.