fix(server): skip an unmappable event on replay instead of tearing down the stream

Wrap the per-event mapper.map in runCatching in the replay loop so a single
event the mapper can't handle no longer kills the whole WebSocket stream.
Defense-in-depth beyond the AnyMapSerializer fix.

apps/server/src/main/kotlin/com/correx/apps/server/ws/SessionStreamHandler.kt

@@ -31,7 +31,10 @@ class SessionStreamHandler(private val module: ServerModule) {
         log.debug("replaying {} event(s) for session={}", replayEvents.size, sessionId.value)
 
         for (event in replayEvents) {
-            mapper.map(event)?.let { msg ->
+            runCatching { mapper.map(event) }
+                .onFailure { log.warn("skipping unmappable event seq={}: {}", event.sequence, it.message) }
+                .getOrNull()
+                ?.let { msg ->
                     session.send(Frame.Text(ProtocolSerializer.encodeServerMessage(msg)))
                 }
         }