Update dependency @convex-dev/presence to v0.4.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@convex-dev/presence	0.3.2 → 0.4.0

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Release Notes

get-convex/presence (@​convex-dev/presence)

v0.4.0

Compare Source

• Replaces per-session scheduled disconnects with a deployment-wide batch
  worker, increasing scalability by avoiding one scheduled function per
  session.
• Upgrades in place without a migration; pre-upgrade sessions get a grace
  deadline and legacy scheduled disconnects are ignored.
• Fixes React Strict Mode remount races that could briefly disconnect an
  active session.
• Prevents duplicate heartbeat intervals in React Native.

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