fix(worker): slow cron cadence to let Neon compute sleep

[outof-place]

Slow down two Vercel cron schedules in the worker to reduce Neon Postgres compute cost.

Changes

• /cron/poll: * * * * * -> */15 * * * *
• /cron/harness-capabilities: */5 * * * * -> */30 * * * *

Rationale

The every-minute poll never lets Neon autosuspend (5 min idle) fire, keeping compute awake 24/7 and driving roughly $120/mo in compute. Dispatch is event-driven from jira/gitlab/github webhooks, so the poll is only a backstop; a 15 min backstop is acceptable.

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Project	Deployment	Actions	Updated (UTC)
ai-workflow-app-dashboard	Ready	Preview	Aug 18, 2026 9:49am

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