Sentry-arroyo

Various fixes & improvements

- fix: Distinguish between backpressure and output overflow (234) by untitaker

Various fixes & improvements

- perf(dlq): Improve performance when there are many invalid messages (233) by lynnagara

Various fixes & improvements

- chore(processor): More logs for shutdown sequences (230) by nikhars
- fix: Remove flaky test (232) by untitaker
- fix: Do not log error when consumer is already crashing (228) by untitaker

Various fixes & improvements

- fix(run_task_with_multiprocessing): Do not attempt to skip over invalid messages (231) by untitaker

Various fixes & improvements

- chore(processor): Add more logging (229) by nikhars
- doc: Document how backpressure currently works (227) by untitaker
- ref: Remove extraneous codecs from arroyo (219) by untitaker

Various fixes & improvements

- docs: Organise processing strategies and add to TOC (226) by lynnagara
- ref: Remove legacy DLQ implementation (225) by lynnagara
- docs: Remove WIP note in DLQ docs (224) by lynnagara
- docs: 2023 (223) by lynnagara
- feat: Count how many times consumer spins (222) by untitaker
- fix: Add metrics around RunTaskWithMultiprocessing + docs [SNS-2204] (220) by untitaker
- ref: Clean up documentation (221) by untitaker