fix(agents): classify tool-execution timeouts

Detect run-level timeouts that fire while a tool call is still active and keep them out of assistant model fallback.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

extensions/codex/src/app-server/event-projector.ts

@@ -220,6 +220,7 @@ export class CodexAppServerEventProjector {
       timedOut: false,
       idleTimedOut: false,
       timedOutDuringCompaction: false,
+      timedOutDuringToolExecution: false,
       promptError,
       promptErrorSource: promptError ? this.promptErrorSource || "prompt" : null,
       sessionIdUsed: this.params.sessionId,