Fix player reconnection by re-registering sync context

When an existing player reconnects to a game, their sync context
is now updated so they continue receiving real-time updates.

go.mod

@@ -2,25 +2,28 @@ module github.com/ryanhamamura/c4
 
 go 1.25.4
 
-require github.com/ryanhamamura/via v0.2.3
+require (
+	github.com/google/uuid v1.6.0
+	github.com/pressly/goose/v3 v3.26.0
+	github.com/ryanhamamura/via v0.2.4
+	golang.org/x/crypto v0.47.0
+	modernc.org/sqlite v1.44.0
+)
 
 require (
 	github.com/CAFxX/httpcompression v0.0.9 // indirect
 	github.com/alexedwards/scs/v2 v2.9.0 // indirect
 	github.com/andybalholm/brotli v1.2.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/google/uuid v1.6.0 // indirect
 	github.com/klauspost/compress v1.18.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mfridman/interpolate v0.0.2 // indirect
 	github.com/ncruces/go-strftime v1.0.0 // indirect
-	github.com/pressly/goose/v3 v3.26.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/sethvargo/go-retry v0.3.0 // indirect
 	github.com/starfederation/datastar-go v1.0.3 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/crypto v0.47.0 // indirect
 	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
 	golang.org/x/sync v0.17.0 // indirect
 	golang.org/x/sys v0.40.0 // indirect
@@ -28,5 +31,4 @@ require (
 	modernc.org/libc v1.67.4 // indirect
 	modernc.org/mathutil v1.7.1 // indirect
 	modernc.org/memory v1.11.0 // indirect
-	modernc.org/sqlite v1.44.0 // indirect
 )