fix(secrets): correct corrupted sops fingerprints for proxmox-minimal and lxc-gui

The previous Phase 4 commit had sed-mangled fingerprints for these two
targets (old and new fingerprints concatenated into one line). The correct
new fingerprints are:
  - proxmox-minimal: age19m0m7vdfg... (freshly generated, no prior key on pve1)
  - lxc-gui:        age1rrxqea6q6... (freshly generated, no prior key on pve1)

Re-run sops updatekeys on common.yaml and gui.yaml to match.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01B2EJ4qTsM5KUqhS5c3GAwx

.sops.yaml

@@ -1,7 +1,7 @@
 keys:
   - &admin age1njap586hc0q43kr03g6c8eqhdsmk8zcafkl3f83xwlc2gqhlmfgs4tmwad
-  - &proxmox-minimal age10at8862478urh0eeuwh8hzln6ck78jgwtztgxatwqlzwagg77y5snm4xzg
-  - &lxc-gui age190htw7prp4vln076dxjx3gxxaq06h0zl0te7cqgpx79vl3lhkaes8suy05
+  - &proxmox-minimal age19m0m7vdfg86yqy8l5mmle5jdd0unrn3f55t232w8h5ey42cqw34sfpt32n
+  - &lxc-gui age1rrxqea6q6pn39sw8y5te63h2py8jgjl9v0jyper86w3ggtn67upqg3ah39
   - &baremetal-gui age1adur9g330gua4l6ndk8cqjg35qc8yxwgme6wrl2hpylcc7vxm38q05ejuy
   - &linode-docker age17e89ty6p0fw24daanen57wg8uald9s025t3wwxsw269svwpmgvrshfvfvt
   - &linode-gui age1hrx8qj02fj2ea6d4g9vqhyj9hl7fppkjqfdx2l37py3h6pdkr95s8n8rvs