Merge feat/676-opcuaclient-followups: endpoint host+port rewrite, TCP-stall wire test, ReconnectPeriod removed, IDriverConnectionLossSource fast recovery, trailing re-read, replay summary (#676)

CLAUDE.md

@@ -321,6 +321,12 @@ non-`Healthy` state **and** its `LastSuccessfulRead` has been frozen for 90 s. T
   `DefaultReconnectInterval`. Unlike the #523 drift detector this generates **no** traffic on a healthy
   system — it is a local `GetHealth()` read, and only reaches the network once a driver has already stopped
   reading.
+- **Fast path for DEFINITIVE losses (#676):** a driver implementing the opt-in `IDriverConnectionLossSource` raises
+  `ConnectionLost` (once per connection) when its protocol proves the connection can never recover in place — OpcUaClient:
+  keep-alive `BadSessionIdInvalid`/`BadSessionClosed`/`BadSessionNotActivated`/`BadServerHalted` or a subscription the
+  SERVER reported dropped (its publishing-stall heuristic does not raise) — and `DriverInstanceActor` (attach PreStart, detach PostStop) turns it into the same disconnect only
+  while Connected; ambiguous failures (timeouts, `BadNoCommunication`, a stalled socket) must never raise and stay with
+  the watchdog's conjunction. `docs/DriverLifecycle.md`.
 
 - **What comms loss now does downstream — one contract, six seams (archreview R3-02).** "A value consumer
   never reports a quality better than its source's" is stated once in `docs/DriverLifecycle.md` §"The