Add missing <returns>/<param>/<summary>/<typeparam> tags and clean up
misused inheritdoc across 481 files so the documented API surface is
complete. Documentation-only (zero code lines changed). The 131 remaining
findings are inheritdoc-style warnings deliberately left to preserve
hand-written implementation rationale (plan-decision notes, race-condition
explanations).
The 2026-04-30 alarm plan banners claimed worker-side native alarm
subscription was blocked on a COM-bitness finding. That's stale: the
mxaccessgw .NET client now has true MxAccess alarm-event support, and a
live StreamAlarms check (+ new Skip-gated GatewayGalaxyAlarmFeedLiveTests
through the lmxopcua consumer) confirms native alarms — operator comment,
category, severity, timestamps — flow end-to-end. Reconcile both plan docs
to reality and add docs/plans/alarms-d1-smoke-artifact.md as the D.1
alarm-source deliverable. Historian-write live smoke + full server->A&C
round-trip remain (Windows parity rig only).
Joseph Doherty