docs: update CHANGELOG with initial development history

CHANGELOG.md

@@ -1,11 +1,21 @@
+# Changelog
 
+All notable changes to MokoSuiteSupport will be documented in this file.
 
-## [01.00.00] --- 2026-06-03
-
-### Changed
-- Migrated all workflow and template paths from `.github/` to `.mokogitea/`
-- Template source paths updated: `templates/gitea/` to `templates/mokogitea/`
-- HCL definition files removed -- Template repos are now the canonical source
+## [01.00.04-dev] - 2026-06-21
 
 ### Added
-- `branch-cleanup.yml`: auto-delete merged feature branches after PR merge
+- Package manifest (`pkg_mokosuitesupport.xml`) with dlid and updateservers
+- ConversationHelper: create, message, unified inbox, assign, close with CSAT
+- AgentHelper: availability check, auto-assign (least-busy), performance metrics
+- CannedResponseHelper: quick replies, keyword search, category management
+- WebhookChannelHelper: Facebook + WhatsApp inbound processing, conversation continuity
+- CsatHelper: CSAT scoring, by-channel breakdown, weekly trend
+- Wiki: Home, guides/Installation, reference/Helpers
+- README with channel overview
+
+### Fixed
+- WebhookChannelHelper: conversation race condition on concurrent webhooks (FOR UPDATE transaction)
+
+### Security
+- Review #19: 1 critical fix applied