Fix Docker Swarm discovery network name mismatch

- Changed NetworkName from 'chorus_default' to 'chorus_net'
- This matches the actual network 'CHORUS_chorus_net' (service prefix added automatically)
- Fixes discovered_count:0 issue - now successfully discovering all 25 agents
- Updated IMPLEMENTATION-SUMMARY with deployment status

Result: All 25 CHORUS agents now discovered successfully via Docker Swarm API

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

cmd/whoosh/main.go

@@ -26,7 +26,7 @@ const (
 
 var (
 	// Build-time variables (set via ldflags)
-	version    = "0.1.1-debug"
+	version    = "0.1.5"
 	commitHash = "unknown"
 	buildDate  = "unknown"
 )
@@ -222,4 +222,4 @@ func setupLogging() {
 	if os.Getenv("ENVIRONMENT") == "development" {
 		log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr})
 	}
-}
+}