fix: adapt the bridge to omp 18.4.8 host differences

- resolve the agent dir through the host getAgentDir() (registered by the composition root) instead of sniffing execPath/argv
- synthesize agent_settled from the first terminal agent_end on omp
- read the live model through ctx.models.current() and prefer it over the stored model on omp
- adapt omp Settings (reloadFromDisk, global enabledModels) at the SDK boundary and drop scoped-model persistence on omp

lib/bindings.ts

@@ -639,6 +639,7 @@ export function registerTelegramLifecycleRuntimeHooks({
       if (!isSessionContextActive(ctx)) return;
       activityRuntime.onAgentSettled();
     },
+    settleOnTerminalAgentEnd: Pi.isOmpHost(pi),
     onBeforeAgentStart: Prompts.createTelegramProactiveBeforeAgentStartHook({
       isConfigured: configStore.hasBotToken,
       isProactivePushEnabled,