feat(instance): native-alarm-source-override CSV bulk import (deferred #12) + doc fixes

Closes the operator parity gap the deferred-work register tracked as #12: native
alarm source overrides could only be set one-at-a-time, while attribute overrides
had a CSV bulk path. Adds an all-or-nothing CSV import for native sources.

- Commons: extract the RFC-4180 line splitter into a shared CsvLineSplitter
  (refactor OverrideCsvParser onto it — no behavior change, pinned by its tests);
  new NativeAlarmSourceOverrideCsvParser (header SourceName,Connection,
  SourceReference,Filter; blank = inherited).
- Commons: NativeAlarmSourceOverrideEntry + bulk SetInstanceNativeAlarmSource-
  OverridesCommand (auto-registered via the reflection command registry).
- ManagementService: Deployer-gated handler — flattens once, validates every
  source resolves + is unlocked + no duplicates up front, then upserts the whole
  batch under a single SaveChanges (true all-or-nothing txn). Added to the frozen
  authorization matrix; dispatch-coverage guard passes.
- CLI: `instance native-alarm-source import --instance-id --file` (parity with
  `instance import-overrides`) + README.
- Tests: native parser (Commons), CLI parse/entry mapping, 3 bulk-handler tests
  (happy path single-commit, locked-source reject, unresolved-source reject).

Also corrects a stale XML-doc line in ScriptRuntimeContext (WaitForAttribute
quality-gated mode is shipped, not "planned") and updates the deferred-work
register: marks #7/#13/#15/#16/#20 verified-resolved, #12 as CLI/API-shipped with
only the Central UI upload affordance still pending.

Claude-Session: https://claude.ai/code/session_01MtdgwpEeCUn6cUA5f1LMPj

src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Scripts/ScriptRuntimeContext.cs

@@ -403,7 +403,9 @@ public class ScriptRuntimeContext
     /// <para>
     /// <b>Quality-agnostic by default (spec §4.2):</b> a value arriving at Bad
     /// quality still satisfies the wait — the match tests the value, not the quality.
-    /// A quality-gated ("Good"-only) mode is a planned enhancement, deferred per spec §4.2.
+    /// Opt into a quality-gated ("Good"-only) wait via the <c>requireGoodQuality</c>
+    /// argument (spec §4.2); the InstanceActor then holds the wait until the value
+    /// satisfies the test at Good quality (or times out).
     /// </para>
     ///
     /// <para>