feat: allow max polls and poll interval

[zanussbaum]

follows style of polling with requests

import time

max_polls = 300
check_url = data["request_check_url"]

for i in range(max_polls):
    time.sleep(2)
    response = requests.get(check_url, headers=headers) # Don't forget to send the auth headers
    data = response.json()

    if data["status"] == "complete":
        break

[voberoi]

Looks good, thanks @zanussbaum.

While you're at it, there's one more open issue related to polling that would be great to fix.

Should any of polls fail in _poll_result because of a flaky connection or intermittent error, the entire conversion fails outright, but it shouldn't.

We should have reasonable default retry behavior on each poll request. This issue tends to come up most when folks are running/testing things locally on flaky wifi.

[zanussbaum]

@voberoi thanks for the suggestions! i added it as a separate function with tenacity. tests pass and was able to run on a doc locally as well. merging