4d6c8a6056
Caught before deploy by tracing a.Path back to its source, not by a failure. The 0.184.0 image is superseded and must not be shipped. ReconcileDriveGates resolves the target as isTarget[a.Path], and a.Path is the REGISTERED StoragePath -- for an external drive that is the GUEST path /mnt/felhom-drives/<name>, not the agent's host MountPath (/mnt/<name>) that /disks reports. driveTargetByPath keyed on MountPath alone, so the lookup never matched: every absent drive, the target included, fell through to the generic storage_disconnected. The alarm would have looked wired, passed its own unit tests, shipped, and been silently wrong on exactly the drive it exists for -- the same defect class E-2b was opened to fix, one level down. Now keyed under BOTH paths, mirroring planDriveGates which already registers present[] under GuestPath and MountPath for the same reason. Red-proof: MountPath-only keying fails with "the backup target is not resolvable by its GUEST path -- the gate passes a.Path (the registered StoragePath), so the backup-target branch would never fire". Green gate: build + vet + test rc=0, run separately from this commit.