fix(trino): Bugfixes & QoL changes - #311

User-feedback fixes and QoL improvements for the Trino module.

Fixed

• Catalog browser now scrolls long schema lists (was clipped after ~30 entries).
• Queries stopped at the 10,000-row limit now actually cancel in Trino — via the client-protocol DELETE nextUri instead of the kill-query-gated DELETE /v1/query/{id}.
• Cancellation and polling now send X-Trino-User when impersonation is enabled (previously ran as the service principal).
• Saving a Trino connection now verifies it (SELECT 1, 10 s timeout) before storing, instead of always reporting success.
• Transport-level query failures now show the reason instead of a bare "Failed" badge.
• Fixed a silent unhandled rejection when the catalog default-schema dropdown failed to load.
• Long catalog names now truncate instead of overflowing horizontally.

Added

• trino.publicUrl: separate browser-facing URL for the "View in Trino" deep link (falls back to trino.url); wired through the Helm chart.
• Resizable catalog browser with a persisted, keyboard-adjustable width.

Tests

• Unit: cancelViaUri, impersonation headers, AbortSignal forwarding, resolveTrinoPublicUrl, row-limit cancel.
• E2E: catalog scroll + resize, transport-error surfacing.