feat: add WebSocket connection manager infrastructure

Add ConnectionManager for real-time WebSocket communication:
- Message types for progress updates, annotations, conflicts
- Broadcast message structure with source device tracking
- Device connection tracking with user and device metadata
- Automatic broadcast loop with concurrent message delivery
- Connection management (add, remove, get by ID/user)
- Stale connection cleanup (2-minute timeout)
- Connection statistics by device type
- Background cleanup task runs every minute

This implements the core WebSocket infrastructure needed for
Week 9 of the Universal Sync Implementation Guide.
This commit is contained in:
2026-01-30 21:46:53 -05:00
parent 25057cf33a
commit 9bfe14bb38
3 changed files with 210 additions and 0 deletions
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@@ -22,6 +22,7 @@ require (
github.com/gabriel-vasile/mimetype v1.4.12 // indirect
github.com/go-playground/locales v0.14.1 // indirect
github.com/go-playground/universal-translator v0.18.1 // indirect
github.com/gorilla/websocket v1.5.3 // indirect
github.com/jackc/pgpassfile v1.0.0 // indirect
github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect
github.com/jackc/puddle/v2 v2.2.1 // indirect