fix(core): keep overview & queue list live (don't pin cache on read)

[omar-zeineddine]

Problem

Fixes #25 — the Overview page never updates live: it stays static even after a hard refresh, while the Runs page updates fine.

Root cause

QueueManager's LRU cache is created with updateAgeOnGet: true, which resets an entry's TTL on every read. The dashboard polls /api/overview and the queue list every 5s (useOverview → refetchInterval: 5000), while overview/queues have a 2-minute TTL. So those entries are re-read long before they expire, their age keeps resetting, and they never expire — the first snapshot is served indefinitely. Because it's a server-side cache, a browser hard refresh doesn't help (matches the report).

The Runs page is unaffected because getAllRuns/getLatestRuns aren't cached. metrics (5m TTL, polled every 30s) and quick-counts had the same latent issue.

A related symptom: pauseQueue/resumeQueue don't invalidate any cache (unlike retryJob/removeJob/promoteJob), so pausing/resuming a queue isn't reflected in the overview or queue list.

Fix

• updateAgeOnGet: false — entries expire on their TTL instead of being pinned by reads.
• overview/queues TTL 2m → 5s, matching the frontend's 5s poll cadence. Job counts are already gated by the existing 5s countCache, so this doesn't add meaningful Redis load.
• Invalidate queues/overview after pauseQueue/resumeQueue so queue control reflects immediately.
• invalidateJobCache now also drops the derived queues entry (the overview is computed from it).

Verification

• bunx tsc --noEmit in packages/core — passes.
• biome check on the changed file — clean.
• Manually: pausing a queue now reflects in the overview/queue list within a poll cycle (and immediately after the action) instead of staying stale.

[vercel]

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