should handle hitting rate limits

[wasaga]

What happened?

Error during streamed response: APIError: Rate limit reached for o3-deep-research in organization org-REDACTED on tokens per min (TPM): Limit 450000, Used 379102, Requested 89741. Please try again in 2.512s. Visit https://platform.openai.com/account/rate-limits to learn more.
    at Stream.iterator (file:///app/.output/server/node_modules/openai/streaming.mjs:57:35)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
    at async Object.start (file:///app/.output/server/chunks/_/ssr.mjs:2401:26) {
  status: undefined,
  headers: undefined,
  request_id: undefined,
  error: {
    type: 'tokens',
    code: 'rate_limit_exceeded',
    message: 'Rate limit reached for o3-deep-research in organization org-REDACTED on tokens per min (TPM): Limit 450000, Used 379102, Requested 89741. Please try again in 2.512s. Visit https://platform.openai.com/account/rate-limits to learn more.',
    param: null
  },
  code: 'rate_limit_exceeded',
  param: null,
  type: 'tokens'
}

that would break the UI with no option to proceed

What did you expect to happen?

There should be a way for the request to be completed in full.

How did it happen?

1. Run deep researcher with o3-deep-researcher model and web search

[nickytonline]

I believe this is covered now in #71.

mcp-app-demo/src/routes/api/chat.ts

Lines 190 to 192 in 1076a13

	case 429:
	clientMessage = 'Rate limit exceeded. Please try again later.'
	break