docs(plans): tick T1B.2 — SiteCommandDispatcher + site gRPC command service (cd6c20e1)

docs/plans/2026-07-22-clusterclient-to-grpc-plan.md

@@ -317,7 +317,7 @@ Critical path ≈ 1B: **~4–6 weeks total**, matching the design estimate.
 
 **Phase 1B — site command plane** (worktree, `feat/grpc-sitecommand`)
 - [x] T1B.1 `site_command.proto` (6 oneof RPCs / 28 commands) + `SiteCommandDtoMapper` + round-trip golden tests (all 28 + replies)
-- [ ] T1B.2 `SiteCommandDispatcher` refactor (actor + new `SiteCommandGrpcService` share it; parked stays node-local)
+- [x] T1B.2 `SiteCommandDispatcher` refactor (actor + new `SiteCommandGrpcService` share it; parked stays node-local)
 - [ ] T1B.3 `ISiteCommandTransport` in `CentralCommunicationActor` (Akka extract + Grpc impl), `SitePairChannelProvider` (Site entity Grpc columns + DB refresh loop), `SiteTransport` flag default `Akka`
 - [ ] T1B.4 Tests: dispatcher routing ×28, actor envelope/reply plumbing, TestServer service tests, existing Communication suites green
 - [ ] 1B DoD: rig central on `Grpc` for site-a proves full command matrix incl. standby parked retry; rebased on 1A; PR merged

docs/plans/2026-07-22-clusterclient-to-grpc-plan.md.tasks.json

@@ -151,17 +151,18 @@
       "id": "T1B.2",
       "phase": "1B",
       "subject": "SiteCommandDispatcher refactor (actor + SiteCommandGrpcService share it; parked stays node-local)",
-      "status": "in_progress",
+      "status": "completed",
       "activeForm": "Extracting the site command dispatcher",
       "blockedBy": [
         "T1B.1"
-      ]
+      ],
+      "notes": "cd6c20e1 on feat/grpc-sitecommand. SiteCommandDispatcher = pure routing (ResolveRoute -> Route{Disposition,Target,Reply}); actor delegates all 27 non-failover Receives to it, gRPC SiteCommandGrpcService calls the SAME dispatcher; shared via SetReady(dispatcher) hand-off like SiteStreamGrpcServer. Parked stays node-local (proven NotSame(proxy)). Interceptor: SiteCommandService added to DefaultGatedPrefixes via descriptor - NO new ctor, one-public-ctor test green. PLAN CORRECTION (important): existing actor code issues cluster Leave BEFORE the ack (fine over ClusterClient Tell, WRONG for gRPC ack-before-Leave). Solved via the pre-existing dryRun param on ClusterFailoverCoordinator.FailOverOldest: seam widened to Func<role,dryRun,addr?>, actor commits immediately (dryRun:false, byte-identical today), gRPC resolves dry-run then defers CommitLeave until after ack. Two ordering tests pin resolve-then-leave. Actor got an OPTIONAL dispatcher param so existing SiteCommunicationActorTests pass with ZERO edits. Server derives local-Ask timeout from ServerCallContext.Deadline (remaining), 2min fallback. Communication.Tests 574, Host.Tests 377."
     },
     {
       "id": "T1B.3",
       "phase": "1B",
       "subject": "ISiteCommandTransport in CentralCommunicationActor (Akka extract + Grpc impl), SitePairChannelProvider, SiteTransport flag",
-      "status": "pending",
+      "status": "in_progress",
       "activeForm": "Building the central->site transport seam",
       "blockedBy": [
         "T1B.1"