I've refactored the stats collection to perform rollups on short-lived requests and added full test coverage for theStatsCollector.

Default rollup window is 1 minute, we can extend it if we want to reduce rows further, but I don't think it'll be necessary.

What's left is:

• Add tests forcoderd andwsproxy to ensure app usage produces stats (?)
• Fix TODO aboutwsproxy auth
• Check correctness ofdbauthz implementation

For now, the data looks like this:

SELECT*, session_ended_at- session_started_atAS session_lengthFROM workspace_app_statsORDER BY session_started_at;