Document 0.3.22 in the changelog

Rename Unreleased to 0.3.22 and move occupancy notes off 0.3.21.

Author: TheGreatAxios

CHANGELOG.md

@@ -13,7 +13,7 @@ parallel copies under `docs/` or `scripts/notes/`. At cut time: rename
 
 ## [Unreleased]
 
-### Added
+## [0.3.22] - 2026-09-11
 
 ### Added
 
@@ -30,6 +30,10 @@ parallel copies under `docs/` or `scripts/notes/`. At cut time: rename
 
 ### Fixed
 
+- Occupancy injects mailbox mail once when a worker burst finishes: one
+  in-flight drive, in-flight ids until send succeeds, and wake copy that
+  does not say the reports were already collected. Overlapping flushes
+  no longer fill the send queue or replay the same reports as new turns.
 - System-originated inbound (`message.received` without the operator flag —
   background shell exits, mailbox mail, fleet-dry and compact continuations)
   paints as a visible system row instead of a user prompt.
@@ -64,10 +68,6 @@ parallel copies under `docs/` or `scripts/notes/`. At cut time: rename
 
 ### Fixed
 
-- Occupancy injects mailbox mail once when a worker burst finishes: one
-  in-flight drive, in-flight ids until send succeeds, and wake copy that
-  does not say the reports were already collected. Overlapping flushes
-  no longer fill the send queue or replay the same reports as new turns.
 - Stalled workers get a full `stallTimeoutMs` grace after the first
   continuation nudge before salvage. Stall pings inside that window wait
   instead of counting toward escalation. Mailbox mail re-flushes from the