fix: include VMID in AI context to prevent incorrect references

The LLM was confusing VMIDs because they weren't included in the
context. Now the formatted context shows:

  ### Container: ollama (VMID 200) on minipc

This prevents the AI from referencing the wrong VMID when generating
findings and recommendations.

internal/ai/context/builder.go

@@ -112,6 +112,7 @@ func (b *Builder) BuildForInfrastructure(state models.StateSnapshot) *Infrastruc
 		trends := b.computeGuestTrends(vm.ID)
 		resourceCtx := FormatGuestForContext(
 			vm.ID, vm.Name, vm.Node, "vm", vm.Status,
+			vm.VMID,
 			vm.CPU, vm.Memory.Usage, vm.Disk.Usage,
 			vm.Uptime, vm.LastBackup, trends,
 		)
@@ -137,6 +138,7 @@ func (b *Builder) BuildForInfrastructure(state models.StateSnapshot) *Infrastruc
 		
 		resourceCtx := FormatGuestForContext(
 			ct.ID, ct.Name, ct.Node, containerType, ct.Status,
+			ct.VMID,
 			ct.CPU, ct.Memory.Usage, ct.Disk.Usage,
 			ct.Uptime, ct.LastBackup, trends,
 		)

internal/ai/context/formatter.go

@@ -15,8 +15,11 @@ func FormatResourceContext(ctx ResourceContext) string {
 	// Header with resource identity
 	typeLabel := formatResourceType(ctx.ResourceType)
 	sb.WriteString(fmt.Sprintf("### %s: %s", typeLabel, ctx.ResourceName))
+	if ctx.VMID > 0 {
+		sb.WriteString(fmt.Sprintf(" (VMID %d)", ctx.VMID))
+	}
 	if ctx.Node != "" && ctx.ResourceType != "node" {
-		sb.WriteString(fmt.Sprintf(" (on %s)", ctx.Node))
+		sb.WriteString(fmt.Sprintf(" on %s", ctx.Node))
 	}
 	sb.WriteString("\n")
 
@@ -471,6 +474,7 @@ func FormatNodeForContext(node models.Node, trends map[string]Trend) ResourceCon
 // Note: cpu is 0-1 ratio from Proxmox API, memUsage and diskUsage are already 0-100 percentages
 func FormatGuestForContext(
 	id, name, node, guestType, status string,
+	vmid int,
 	cpu, memUsage, diskUsage float64,
 	uptime int64,
 	lastBackup time.Time,
@@ -481,6 +485,7 @@ func FormatGuestForContext(
 		ResourceType:  guestType,
 		ResourceName:  name,
 		Node:          node,
+		VMID:          vmid,
 		CurrentCPU:    cpu * 100,  // Convert from 0-1 to percentage
 		CurrentMemory: memUsage,   // Already 0-100 percentage from Memory.Usage
 		CurrentDisk:   diskUsage,  // Already 0-100 percentage from Disk.Usage

internal/ai/context/formatter_test.go

@@ -385,6 +385,7 @@ func TestFormatGuestForContext(t *testing.T) {
 		"pve-1",
 		"vm",
 		"running",
+		100,   // VMID
 		0.35,  // CPU (0-1)
 		65.0,  // Memory (0-100)
 		45.0,  // Disk (0-100)

internal/ai/context/types.go

@@ -116,6 +116,7 @@ type ResourceContext struct {
 	ResourceType string // "node", "vm", "container", "oci_container", "storage", "docker_host"
 	ResourceName string
 	Node         string // Parent node (for guests)
+	VMID         int    // Proxmox VMID for VMs/containers (0 if not applicable)
 
 	// Current state (point-in-time)
 	CurrentCPU     float64