[CON-435] - Track metrics content stream

[vicky-g]

Description

In this PR:

• adds metrics to the /ipfs/<cid> and /ipfs/<dirCID>/<filename> routes
• prometheus labels in the prometheus constants file + metric mapping for ipfs route
• updates the prom middleware to add in the route regex into the express request object used to match on the metric associated with the route, if there is one
• middleware to fetch the metric for a route, if it exists
• wrapper api helper send fn that ends the metric, if it exists
• misc. typescript changes, importantly including adding metrics properties to the request type

Tests

• a unit test in creator-node/test/prometheus.test.js

# HELP audius_cn_stream_content_duration_seconds Time spent to stream content (seconds)
# TYPE audius_cn_stream_content_duration_seconds histogram
audius_cn_stream_content_duration_seconds_bucket{le="0.1",result="success_found_in_fs",mode="new_storage_path"} 20
audius_cn_stream_content_duration_seconds_bucket{le="0.2",result="success_found_in_fs",mode="new_storage_path"} 21
audius_cn_stream_content_duration_seconds_bucket{le="0.5",result="success_found_in_fs",mode="new_storage_path"} 21
audius_cn_stream_content_duration_seconds_bucket{le="1",result="success_found_in_fs",mode="new_storage_path"} 21
audius_cn_stream_content_duration_seconds_bucket{le="4",result="success_found_in_fs",mode="new_storage_path"} 21
audius_cn_stream_content_duration_seconds_bucket{le="15",result="success_found_in_fs",mode="new_storage_path"} 21
audius_cn_stream_content_duration_seconds_bucket{le="60",result="success_found_in_fs",mode="new_storage_path"} 21
audius_cn_stream_content_duration_seconds_bucket{le="+Inf",result="success_found_in_fs",mode="new_storage_path"} 21
audius_cn_stream_content_duration_seconds_sum{result="success_found_in_fs",mode="new_storage_path"} 1.250481766
audius_cn_stream_content_duration_seconds_count{result="success_found_in_fs",mode="new_storage_path"} 21
audius_cn_stream_content_duration_seconds_bucket{le="0.1",result="abort_bad_cid",mode="default"} 1
audius_cn_stream_content_duration_seconds_bucket{le="0.2",result="abort_bad_cid",mode="default"} 1
audius_cn_stream_content_duration_seconds_bucket{le="0.5",result="abort_bad_cid",mode="default"} 1
audius_cn_stream_content_duration_seconds_bucket{le="1",result="abort_bad_cid",mode="default"} 1
audius_cn_stream_content_duration_seconds_bucket{le="4",result="abort_bad_cid",mode="default"} 1
audius_cn_stream_content_duration_seconds_bucket{le="15",result="abort_bad_cid",mode="default"} 1
audius_cn_stream_content_duration_seconds_bucket{le="60",result="abort_bad_cid",mode="default"} 1
audius_cn_stream_content_duration_seconds_bucket{le="+Inf",result="abort_bad_cid",mode="default"} 1
audius_cn_stream_content_duration_seconds_sum{result="abort_bad_cid",mode="default"} 0.005209824
audius_cn_stream_content_duration_seconds_count{result="abort_bad_cid",mode="default"} 1

# HELP audius_cn_stream_content_dir_duration_seconds Time spent to stream content from directory (seconds)
# TYPE audius_cn_stream_content_dir_duration_seconds histogram
audius_cn_stream_content_dir_duration_seconds_bucket{le="0.1",result="abort_cid_not_found_in_db"} 1
audius_cn_stream_content_dir_duration_seconds_bucket{le="0.2",result="abort_cid_not_found_in_db"} 1
audius_cn_stream_content_dir_duration_seconds_bucket{le="0.5",result="abort_cid_not_found_in_db"} 1
audius_cn_stream_content_dir_duration_seconds_bucket{le="1",result="abort_cid_not_found_in_db"} 1
audius_cn_stream_content_dir_duration_seconds_bucket{le="4",result="abort_cid_not_found_in_db"} 1
audius_cn_stream_content_dir_duration_seconds_bucket{le="15",result="abort_cid_not_found_in_db"} 1
audius_cn_stream_content_dir_duration_seconds_bucket{le="60",result="abort_cid_not_found_in_db"} 1
audius_cn_stream_content_dir_duration_seconds_bucket{le="+Inf",result="abort_cid_not_found_in_db"} 1
audius_cn_stream_content_dir_duration_seconds_sum{result="abort_cid_not_found_in_db"} 0.005693088
audius_cn_stream_content_dir_duration_seconds_count{result="abort_cid_not_found_in_db"} 1

Monitoring - How will this change be monitored? Are there sufficient logs / alerts?

Look at /prometheus_metrics to see if metrics are recorded for cids under audius_cn_stream_content_duration_seconds_bucket and audius_cn_stream_content_dir_duration_seconds_count

[vicky-g]

@SidSethi could you take a look at this when you have a chance?

[vicky-g]

@jonaylor89 I made some changes to the RequestWithLogger type

[SidSethi]

@jonaylor89 tagging for review bc there are a lot of TS changes prob good to get your eyes on those at least