docs(archreview): PLAN-02 tasks.json — mark T18,T19,T20 complete (batch 6)

archreview/plans/PLAN-02-communication-store-and-forward.md.tasks.json

@@ -129,7 +129,7 @@
     {
       "id": 18,
       "subject": "Task 18: Epoch-ms due-check (replace per-row julianday parsing)",
-      "status": "pending",
+      "status": "completed",
       "blockedBy": [
         17
       ]
@@ -137,7 +137,7 @@
     {
       "id": 19,
       "subject": "Task 19: Decouple audit-observer notification from the sweep (ordered channel)",
-      "status": "pending",
+      "status": "completed",
       "blockedBy": [
         12
       ]
@@ -145,7 +145,7 @@
     {
       "id": 20,
       "subject": "Task 20: Buffer resync storage primitives (GetAllMessagesAsync / ReplaceAllAsync)",
-      "status": "pending",
+      "status": "completed",
       "blockedBy": [
         18
       ]