🔧 chore: Upgrade Meilisearch to version 1.28.2

[ethanlaj]

Pull Request Template

Summary

This pull request updates the Meilisearch service configuration in both deploy-compose.yml and docker-compose.yml files to use a newer version and a new data volume. This change is intended to resolve the following:

• curl 8.11.1-r0 8.12.0-r0 apk CVE-2025-0665 Critical 14.0% (94th) 13.2
• libcurl 8.11.1-r0 8.12.0-r0 apk CVE-2025-0665 Critical 14.0% (94th) 13.2

(by severity: 2 critical, 11 high, 15 medium, 8 low, 0 negligible)

After upgrade - by severity: 0 critical, 0 high, 1 medium, 6 low, 0 negligible

Change Type

• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Note that by breaking change, LibreChat docs already include proper instructions for the fix: https://www.librechat.ai/docs/configuration/meilisearch#9-resetting-meilisearch-synchronization

Testing

Automated tests, ensured that searching still works on existing and new chats.

Checklist

• I have performed a self-review of my own code
• My changes do not introduce new warnings
• Local unit tests pass with my changes