fix(doctor): TOFU capture-fix parity with bootstrap — v0.6 ship-defect (T02.9)

---ci---
project: orca
phase: 2
milestone: v0.8
status: execute
---/ci---

internal/doctor/doctor.go

@@ -26,11 +26,11 @@ import (
 	"time"
 
 	"golang.org/x/crypto/ssh"
-	"golang.org/x/crypto/ssh/knownhosts"
 
 	"git.cloudinit.dev/coreci/orca/internal/certpaths"
 	"git.cloudinit.dev/coreci/orca/internal/model"
 	"git.cloudinit.dev/coreci/orca/internal/osdetect"
+	"git.cloudinit.dev/coreci/orca/internal/proxmox"
 	"git.cloudinit.dev/coreci/orca/internal/security"
 	"git.cloudinit.dev/coreci/orca/internal/store"
 	"git.cloudinit.dev/coreci/orca/internal/transport"
@@ -409,7 +409,19 @@ func probeProxmoxPVEVersion(ctx context.Context, host string) error {
 		return fmt.Errorf("parse SSH key: %w", err)
 	}
 
-	hostKeyCallback, err := knownhosts.New(certpaths.KnownHostsPath())
+	// Extract host from the node address (orca stores host:8443;
+	// SSH needs host:22). We dial the SSH port, not the orca daemon port.
+	sshHost := host
+	if strings.Contains(host, ":") {
+		sshHost = strings.SplitN(host, ":", 2)[0]
+	}
+	sshAddr := sshHost + ":22"
+
+	// Use the shared TOFU capture-fix wrapper (T02.9 — GRILL condition
+	// #2: doctor parity with bootstrap). Without this, a first-connect
+	// proxmox node (entry missing from known_hosts) fails the doctor
+	// probe even though it joined fine — the v0.6 ship-defect.
+	hostKeyCallback, err := proxmox.TOFUHostKeyCallback(sshAddr, nil)
 	if err != nil {
 		return fmt.Errorf("known_hosts: %w", err)
 	}
@@ -421,14 +433,6 @@ func probeProxmoxPVEVersion(ctx context.Context, host string) error {
 		Timeout:         3 * time.Second,
 	}
 
-	// Extract host from the node address (orca stores host:8443;
-	// SSH needs host:22). We dial the SSH port, not the orca daemon port.
-	sshHost := host
-	if strings.Contains(host, ":") {
-		sshHost = strings.SplitN(host, ":", 2)[0]
-	}
-	sshAddr := sshHost + ":22"
-
 	dialer := &netDialer{}
 	conn, err := dialer.DialContext(ctx, "tcp", sshAddr, config)
 	if err != nil {