stream-loader and url-fetcher can become unresponsive about docnow

[edsu]

I think I've observed StreamLoader getting stuck when the unit tests run via GitHub actions. smoketest and the GitHub actions both use the same keys, and may be interfering with each other somehow.

[edsu]

I noticed that SearchLoader ran into a connection reset error and didn't recover from it. From the app.log:

{"code":"ECONNRESET","errno":"ECONNRESET","level":"error","message":"request to https://api.twitter.com/2/tweets/search/all?expansions=author_id%2Cin_reply_to_user_id%2Creferenced_tweets.id%2Creferenced_tweets.id.author_id%2Centities.mentions.username%2Cattachments.poll_ids%2Cattachments.media_keys%2Cgeo.place_id&user.fields=created_at%2Cdescription%2Centities%2Cid%2Clocation%2Cname%2Cpinned_tweet_id%2Cprofile_image_url%2Cprotected%2Cpublic_metrics%2Curl%2Cusername%2Cverified%2Cwithheld&tweet.fields=attachments%2Cauthor_id%2Ccontext_annotations%2Cconversation_id%2Ccreated_at%2Centities%2Cgeo%2Cid%2Cin_reply_to_user_id%2Clang%2Cpublic_metrics%2Ctext%2Cpossibly_sensitive%2Creferenced_tweets%2Creply_settings%2Csource%2Cwithheld&media.fields=alt_text%2Cduration_ms%2Cheight%2Cmedia_key%2Cpreview_image_url%2Ctype%2Curl%2Cwidth%2Cpublic_metrics&poll.fields=duration_minutes%2Cend_datetime%2Cid%2Coptions%2Cvoting_status&place.fields=contained_within%2Ccountry%2Ccountry_code%2Cfull_name%2Cgeo%2Cid%2Cname%2Cplace_type&query=%23blacklivesmatter&max_results=100&start_time=2012-02-01T14%3A59%3A00Z&end_time=2016-12-31T14%3A59%3A00Z&next_token=REDACTED failed, reason: read ECONNRESET","type":"system"}

I think SearchLoader should catch these, sleep a little bit, and requeue.

[edsu]

The other one that needs to be caught in the StreamLoader:

tweet-loader_1  | {"level":"error","message":"stream disconnected with error Stream unresponsive","stack":"Error: Stream unresponsive\n    at Timeout.<anonymous> (/code/node_modules/twitter-v2/build/TwitterStream.js:43:38)\n    at listOnTimeout (internal/timers.js:549:17)\n    at processTimers (internal/timers.js:492:7)"}