fix(automations): clear stale scheduler install gate

[pascalandr]

Summary

• clear the local schedulerInstallRequested gate once the scheduler plugin actually appears as installed
• also clear that gate when plugin installation fails, so the Automations UI does not stay stuck in a pseudo-installed state
• keep the existing reload/install flow intact while removing the stale local state that could block automations after a successful install

Context

• fixes [Bug]: Install scheduler reports success but does not unlock automations #1422

Testing

• pnpm --filter @openwork/app exec vite build

[vercel]

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Project	Deployment	Actions	Updated (UTC)
openwork-landing	Ready	Preview, Comment, Open in v0	Apr 16, 2026 3:04pm

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The following comment was made by an LLM, it may be inaccurate:

[src-opn]

Thanks!