feat(historian): #691 HistoryRead-Raw ReturnBounds — Part 11 bounding values on every backend

The node manager composes the start/end bounds from each backend's existing raw
reads (one authority, HistoryBounds): at-or-before = a capped reverse read
(native, or ReverseRawReader's walk-back on a forward-only backend — never
AVEVA's synthetic boundary row), at-or-after = a capped forward read. Bounds
count toward NumValuesPerNode, the start bound leads the first page, the end
bound ends the last (carried in the continuation point). Missing bound =
Bad_BoundNotFound (null, at the bound time; one-sided reads ±1 s from the
previous value, Table 1 footnotes a/b). A modified read with ReturnBounds is
Bad_InvalidArgument (Part 11 6.5.3.3).

The .NET SDK's ReadRawModifiedDetails defaults ReturnBounds to TRUE; the
existing tests built details without setting it and now set it false.
Oracle: every row of Part 11 Table 1 over three backend shapes, plus paging
concatenation, ties, Bad bounds, microsecond truncation; conformance pins the
lookup primitives on SqlServer + QuestDB.

tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.Tests/NodeManagerHistoryReadTests.cs

@@ -52,6 +52,7 @@ public sealed class NodeManagerHistoryReadTests : IDisposable
         var end = DateTime.UtcNow;
         var details = new ReadRawModifiedDetails
         {
+            ReturnBounds = false,
             StartTime = start,
             EndTime = end,
             NumValuesPerNode = 100,
@@ -97,6 +98,7 @@ public sealed class NodeManagerHistoryReadTests : IDisposable
 
         var details = new ReadRawModifiedDetails
         {
+            ReturnBounds = false,
             StartTime = DateTime.UtcNow.AddHours(-1),
             EndTime = DateTime.UtcNow,
             NumValuesPerNode = 10,
@@ -129,6 +131,7 @@ public sealed class NodeManagerHistoryReadTests : IDisposable
 
         var details = new ReadRawModifiedDetails
         {
+            ReturnBounds = false,
             StartTime = DateTime.UtcNow.AddHours(-1),
             EndTime = DateTime.UtcNow,
             NumValuesPerNode = 10,
@@ -162,6 +165,7 @@ public sealed class NodeManagerHistoryReadTests : IDisposable
 
         var details = new ReadRawModifiedDetails
         {
+            ReturnBounds = false,
             StartTime = DateTime.UtcNow.AddHours(-1),
             EndTime = DateTime.UtcNow,
             NumValuesPerNode = 10,
@@ -195,6 +199,7 @@ public sealed class NodeManagerHistoryReadTests : IDisposable
 
         var details = new ReadRawModifiedDetails
         {
+            ReturnBounds = false,
             StartTime = DateTime.UtcNow.AddHours(-1),
             EndTime = DateTime.UtcNow,
             NumValuesPerNode = 10,
@@ -613,6 +618,7 @@ public sealed class NodeManagerHistoryReadTests : IDisposable
 
         var details = new ReadRawModifiedDetails
         {
+            ReturnBounds = false,
             StartTime = DateTime.UtcNow.AddHours(-1),
             EndTime   = DateTime.UtcNow,
             NumValuesPerNode = 10,
@@ -658,6 +664,7 @@ public sealed class NodeManagerHistoryReadTests : IDisposable
 
         var details = new ReadRawModifiedDetails
         {
+            ReturnBounds = false,
             StartTime = DateTime.UtcNow.AddHours(-1),
             EndTime = DateTime.UtcNow,
             NumValuesPerNode = 10,