DiscoverAsync now unconditionally emits SecurityClassification.ViewOnly
for every user-authored FOCAS tag. Previously the SecurityClass was
tag.Writable ? Operate : ViewOnly, but WireFocasClient.WriteAsync always
returns BadNotWritable — advertising Operate misleads OPC UA clients
and the DriverNodeManager ACL layer into granting write permission on
nodes that can never be written.
Updated FocasCapabilityTests.DiscoverAsync_emits_pre_declared_tags to
assert ViewOnly for the writable-by-config tag so it matches the
corrected behaviour.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
f23cea201d