Add fleet ops dashboard, Calibrate enforcement, and dead-code cleanup.

Ship live alerts, pool status, AI monitor, remote agent commands, build manager, and uninstall flow; wire Calibrate settings (WS ping, pool traffic log, retention limits) at runtime and exclude server/data from git.

server/internal/api/server_policy.go

@@ -0,0 +1,12 @@
+package api
+
+// ServerPolicy holds Calibrate settings enforced at runtime.
+type ServerPolicy struct {
+	MaxAgents              int
+	LogAgentConnections    bool
+	LogShareSubmissions    bool
+	LogPoolTraffic         bool
+	StrictWalletValidation bool
+	MaxBuildSizeMB         int
+	PoolReconnectSeconds   int
+}