Housekeeping: normalize post-release state

.github/workflows/dependency-refresh-tests.yml

@@ -3,7 +3,7 @@ name: Dependency Refresh Tests
 on:
   push:
     branches:
-      - feature/7-units-0.2.3-dependency-refresh
+      - main
   pull_request:
     branches:
       - main

CHANGELOG.md

@@ -7,7 +7,7 @@
 - Preserved the ESPressio Observable baseline at `>=3.0.1 <4.0.0`.
 - Preserved Timing's architecture in which Serializable time representations are supplied through opt-in Serializable Unit types rather than a direct Timing -> Serializable dependency.
 - Updated package metadata, README and current dependency documentation for Timing 2.2.4.
-- Updated release-candidate validation to exercise the Units 0.2.3 candidate until the corresponding release tag is available.
+- Updated validation to exercise the released Units 0.2.3 dependency.
 
 ### Compatibility
 - No Timing public API or runtime behaviour changes are introduced by this dependency-maintenance release.
@@ -114,7 +114,7 @@ Major architectural release.
 
 ### New architecture
 
-- `SystemClock<TTime>` is now a typed facade over one shared `SystemClockCore<TLockPolicy, TTick>` singleton, so different time representations observe the same global timeline.
+- `SystemClock<TTime>` is a typed facade over one shared `SystemClockCore<TLockPolicy, TTick>` singleton, so different time representations observe the same global timeline.
 
 - Added `TimeTraits<TTime>` customization point.
 - Added configurable raw `TTick` storage/arithmetic type.

ESPRESSIO_DEPENDENCY_CHART.md

@@ -28,22 +28,26 @@ of the Timing core.
 ## Current coordinated ecosystem
 
 ```text
-Observable 3.0.1
-Serializable 0.10.2
-Units 0.2.3 (candidate until released)
-    |
-    v
-Timing 2.2.4
-    |
-    +--> Threads 3.1.4 (planned downstream refresh)
-    |
-    +--> ESP-Now 0.5.2 (planned downstream refresh)
-
-Event 5.8.2 is the planned downstream convergence release after Threads and
-ESP-Now are refreshed.
-
-Serial 0.5.1 remains the final downstream diagnostics/operator release
-candidate.
+FOUNDATIONAL
+├── Observable 3.0.1
+├── Serializable 0.10.2
+├── Units 0.2.3
+├── Security 0.2.0
+└── Command 0.3.0
+
+RUNTIME
+└── Timing 2.2.4
+
+EXECUTION
+└── Threads 3.1.4
+
+TRANSPORT / INTEGRATION
+├── Sockets 0.5.0
+├── ESP-Now 0.5.2
+└── Event 5.8.2
+
+DIAGNOSTICS / OPERATOR
+└── Serial 0.5.1
 ```
 
 Security 0.2.0, Command 0.3.0 and Sockets 0.5.0 remain separate branches of