docs(#655): history is server-side only; rewrite OPC-009 and stale driver-history references

Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe

docs/drivers/OpcUaClient-Test-Fixture.md

@@ -58,7 +58,7 @@ Wire-level surfaces verified: `IDriver` + `IReadable` + `ISubscribable` +
 against the in-process OtOpcUa server (`ServerEventRig`, authenticating with the rig's API-key credential):
 read (+ missing node), write through the node-write gateway (+ read-only refusal, + failed-write revert),
 subscribe/unsubscribe, host-status Running -> not-Running when the server stops, and discovery. These need
-no Docker. The HistoryRead wire leg is deferred (needs an `IHistorianDataSource` stub on the server).
+no Docker. There is no HistoryRead leg: the driver has no history capability (#655).
 
 ### Unit
 
@@ -82,11 +82,10 @@ mirrors the full capability matrix):
   driver config
 - `OpcUaClientAlarmTests` — A&E severity bucket (1–1000 → Low / Medium /
   High / Critical), subscribe / unsubscribe / ack contract
-- `OpcUaClientHistoryTests` — historical data read + interpolation contract
 
 Capability surfaces whose contract is verified: `IDriver`, `ITagDiscovery`,
 `IReadable`, `IWritable`, `ISubscribable`, `IHostConnectivityProbe`,
-`IAlarmSource`, `IHistoryProvider`.
+`IAlarmSource`.
 
 ## What it does NOT cover
 
@@ -113,15 +112,7 @@ The lossy window is not characterized.
 session — the shape that breaks publish-queue-size tuning in the wild — is
 not exercised.
 
-### 4. Real historian mappings
-
-`IHistoryProvider.ReadRawAsync` + `ReadProcessedAsync` +
-`ReadAtTimeAsync` + `ReadEventsAsync` are contract-mocked. Against a real
-historian (AVEVA Historian, Prosys historian, Kepware LocalHistorian) each
-has specific interpolation + bad-quality-handling quirks the contract test
-doesn't see.
-
-### 5. Real A&E events
+### 4. Real A&E events
 
 Alarm subscription is mocked via filtered monitored items; the actual
 `EventFilter` select-clause behavior against a server that exposes typed
@@ -187,8 +178,8 @@ Beyond that:
 - `tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.IntegrationTests/Docker/docker-compose.yml`
   — `mcr.microsoft.com/iotedge/opc-plc:2.14.10` with `--ut --aa --alm --pn=50000`
 - `src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient/OpcUaClientDriver.cs` — ctor +
-  session-factory seam tests mock through; implements `IAlarmSource` +
-  `IHistoryProvider` (unique among drivers); does NOT implement `IRediscoverable`
+  session-factory seam tests mock through; implements `IAlarmSource`;
+  does NOT implement `IRediscoverable`
 - `tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests/DualEndpointTests.cs` —
   the v2 dual-endpoint integration harness a future loopback client test could
   piggyback on (v1 `OpcUaServerIntegrationTests.cs` retired with the v1 server project)