docs: sync CLAUDE.md files with current architecture

Drop the removed tag system, fix the retired Manual status and the atomic
queue-claim location, refresh the App DI registrations to the Islands VMs,
update the Data table list, correct a stale test reference, and document the
interface-folder and single-consumer-fold conventions plus the .NET 8 build path.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/ClaudeDo.Worker/CLAUDE.md

@@ -17,6 +17,8 @@ Worker/
   Hub/          — WorkerHub, HubBroadcaster
 ```
 
+Interfaces (e.g. `IQueueWaker`, `IPrimeClock`, `ITaskStateService`) live in an `Interfaces/` subfolder within their area; the namespace stays the area namespace.
+
 ## Architecture
 
 - **Program.cs** — loads config, inits schema, registers DI, configures SignalR on `/hub`, binds to `127.0.0.1:47821`