[misc] bump the version of the metrics module to 3.5.1

[das7pad]

Description

For https://github.com/overleaf/issues/issues/3764

• 3.5.1

  • drop background process

• 3.5.0

  • decaf cleanup
  • add support for swagger-tools router

Related Issues / PRs

For https://github.com/overleaf/issues/issues/3764

Potential Impact

High. Incomplete metrics collection.

Manual testing performed

• create a new project
• open a project in the editor
• make changes to a document, reload the editor to check persistence
• compile a project
• open the history tab in the editor
• repeat testing with legacy history service
• all services seem to be running fine in the dev-env

• request all the /metrics endpoints and see many metric lines each

  dev-environment$ grep -e 127.0.0.1:3 -e 127.0.0.1:40 docker-compose.yml | sed -E 's/.+- (.+):(.+):(.+)/\1:\2/' | xargs -I % sh -c 'echo -n "%: lines=" && curl %/metrics -s | wc -l'
  127.0.0.1:3010: lines=116
  127.0.0.1:3016: lines=242
  127.0.0.1:3003: lines=510
  127.0.0.1:3009: lines=212
  127.0.0.1:3022: lines=141
  127.0.0.1:3026: lines=224
  127.0.0.1:3036: lines=128
  127.0.0.1:3042: lines=161
  127.0.0.1:3015: lines=190
  127.0.0.1:3054: lines=405
  127.0.0.1:4000: lines=800
  127.0.0.1:3809: lines=10   <- 404 from webpack, which is fine
  127.0.0.1:3013: lines=306
  127.0.0.1:3005: lines=162
  127.0.0.1:3007: lines=116
  127.0.0.1:3050: lines=132
  127.0.0.1:3046: lines=153
  127.0.0.1:3040: lines=153
  127.0.0.1:3020: lines=153
  127.0.0.1:3002: lines=232
  127.0.0.1:3030: lines=264
  127.0.0.1:3100: lines=201