Mobile triage process feedback

An issue to track our thoughts/queries on triage process

From the Android perspective https://github.com/vector-im/element-android/projects/4

#### Board
- Should the triage board be removed when another project has been added to an issue?
- The `Triaged` column is never cleared, making the github project very slow! should we remove the triage project after applying the labels?
- Do we need the `Backlog` column?

#### Labelling

- When applying the `O - occurrence` label, are we favouring how often the issue actually happens (which is difficult to quantify without tracking) or how easy it is to reproduce/trigger

Start by reviewing the Android triage project linked in the issue, including its Board columns and the `O - occurrence` label. Resolve the listed process questions with the project owners, then document the agreed triage workflow and label definitions; the issue is done when those decisions are recorded and actionable.

Written by the indexing model from the issue text.