Fix council formation broadcast and reduce core roles

Two critical fixes for E2E council workflow:

1. Reduced core council roles from 8 to 2 (tpm + senior-software-architect)
   - Faster council formation
   - Easier debugging
   - Sufficient for initial project planning

2. Added broadcast to monitor path
   - Monitor now broadcasts council opportunities to CHORUS agents
   - Previously only webhook path had broadcast, monitor path missed it
   - Added broadcaster parameter to NewMonitor()
   - Broadcast sent after council formation with 30s timeout

Verified working:
- Council formation successful
- Broadcast to CHORUS agents confirmed
- Role claims received (TPM claimed and loaded)
- Persona status "loaded" acknowledged

Image: anthonyrawlins/whoosh:broadcast-fix
Council: 2dad2070-292a-4dbd-9195-89795f84da19

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

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

internal/server/server.go

@@ -179,8 +179,8 @@ func NewServer(cfg *config.Config, db *database.DB) (*Server, error) {
 		log.Warn().Msg("🐳 Docker integration disabled - scaling system and council agent deployment unavailable")
 	}
 
-	// Initialize repository monitor with team composer, council composer, and agent deployer
-	repoMonitor := monitor.NewMonitor(db.Pool, cfg.GITEA, teamComposer, councilComposer, agentDeployer)
+	// Initialize repository monitor with team composer, council composer, agent deployer, and broadcaster
+	repoMonitor := monitor.NewMonitor(db.Pool, cfg.GITEA, teamComposer, councilComposer, agentDeployer, p2pBroadcaster)
 
 	s := &Server{
 		config:            cfg,