fix(redis): require ready client before commands

[RSO]

Summary

• Require the Redis client to be fully ready before reusing it for commands, avoiding stale open-but-not-ready sockets on Vercel instances.
• Reset the shared connect promise after connect attempts complete so future disconnected clients can reconnect cleanly.

Verification

N/A - server helper change; no manual runtime verification performed.

Visual Changes

N/A

Reviewer Notes

This is intentionally minimal: it preserves the existing Redis timeout and Sentry behavior while tightening the readiness check.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

Both changes are correct: isReady properly gates commands on a fully connected client, and moving connectPromise = null to .finally() ensures the reconnect path works after a successful connection is later lost.

Files Reviewed (1 file)

• apps/web/src/lib/redis.ts

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_{Reviewed by claude-4.6-sonnet-20260217 · 272,542 tokens}

_{Review guidance: REVIEW.md from base branch main}