fix(agents): exclude rate limit errors from context overflow classification (#13747)

Co-authored-by: 0xRaini <rain@0xRaini.dev>

src/agents/pi-embedded-helpers/errors.ts

@@ -40,6 +40,12 @@ export function isLikelyContextOverflowError(errorMessage?: string): boolean {
   if (CONTEXT_WINDOW_TOO_SMALL_RE.test(errorMessage)) {
     return false;
   }
+  // Rate limit errors can match the broad CONTEXT_OVERFLOW_HINT_RE pattern
+  // (e.g., "request reached organization TPD rate limit" matches request.*limit).
+  // Exclude them before checking context overflow heuristics.
+  if (isRateLimitErrorMessage(errorMessage)) {
+    return false;
+  }
   if (isContextOverflowError(errorMessage)) {
     return true;
   }