fix: respect disabled_tools config in agent prompts (fixes #2742)

- Check disabled_tools for 'question' in tool-config-handler permission logic
- Strip Question tool code examples from Prometheus prompts when disabled
- Pass disabled_tools through prometheus agent config builder pipeline
- Add tests for disabled_tools question permission handling

src/plugin-handlers/tool-config-handler.ts

@@ -44,7 +44,9 @@ export function applyToolConfig(params: {
 
   const isCliRunMode = process.env.OPENCODE_CLI_RUN_MODE === "true";
   const configQuestionPermission = getConfigQuestionPermission();
+  const isQuestionDisabledByPlugin = params.pluginConfig.disabled_tools?.includes("question") ?? false;
   const questionPermission =
+    isQuestionDisabledByPlugin ? "deny" :
     configQuestionPermission === "deny" ? "deny" :
     isCliRunMode ? "deny" :
     "allow";