Limit connections to 12 and fix application connection and deletion logic

[ravjotbrar]

Description

• Start one metrics server for only connected nodes, instead of all cluster nodes
• Close metrics server when we disconnect/delete a connection by adding a delete endpoint
• Limit active connections to a maximum of 12
• Change tap in connection epic to mergeMap so returns aren't ignored
• Fix delete epic to close and delete connections appropriately
• Reuse GlideClusterClient for all nodes belonging to the same cluster
• Add clusterId to clients map so we know when to close glide cluster client
• Add clusterNodesMap to keep track of connected nodes per cluster

Change Visualization

Limited to 1 for testing purposes

Screen.Recording.2026-02-11.at.2.19.03.PM.mov