A query language over readable repositories (repo:, owner:, is:, label:, milestone:, no:, assignee:, author:, free text through the existing search); query save|list|show|run|remove|pin|unpin, issue list/mr list --query <name> or --q <query>, paged with keyset cursors. Pinned queries on the dashboard (JSON and web) and /{owner}/-/queries[/{name}] for the owner. At most 50 saved and 10 pinned per account; readability resolved per repository with repo_id/created_at indexes. Migration. Parity/Users/CHANGELOG.
Closes #292