Initial commit: managed .NET 10 AVEVA Historian SDK + reverse-engineering toolkit

Full read-only SDK (src/AVEVA.Historian.Client) implementing the CLAUDE.md required
surface against AVEVA Historian's binary WCF protocol — no native AVEVA runtime
dependency. All operations live-verified against a local Historian:

- ProbeAsync, ReadRawAsync, ReadAggregateAsync, ReadAtTimeAsync, ReadEventsAsync
- BrowseTagNamesAsync, GetTagMetadataAsync (17 native data-type codes mapped)
- GetConnectionStatusAsync, GetStoreForwardStatusAsync, GetSystemParameterAsync
- 108/108 unit + integration tests pass

Includes the reverse-engineering toolkit (tools/AVEVA.Historian.ReverseEngineering)
used to decode the protocol: WCF probes, IL inspection via dnlib, and IL-rewrite
instrumentation (instrument-wcf-{write,read}message etc.) plus the .NET Framework
trace harness (tools/AVEVA.Historian.NativeTraceHarness) for parity testing.

Sanitized handoff evidence under docs/reverse-engineering/. Native AVEVA binaries
(current/, aveva-install-x64/, aveva-install-x86/) are gitignored — fetch separately
from the AVEVA installer.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/reverse-engineering/loaded-modules-aahclientmanaged-read-latest.json

@@ -0,0 +1,48 @@
+{
+    "ModuleName":  "aahClientManaged.dll",
+    "BaseAddress":  140722710380544,
+    "ModuleMemorySize":  17166336,
+    "FileName":  "C:\\Users\\dohertj2\\Desktop\\histsdk\\current\\aahClientManaged.dll"
+}
+{
+    "Operation":  "aahClientManaged.HistoryQuery.Integrated",
+    "HostName":  "localhost",
+    "Port":  32568,
+    "IntegratedSecurity":  true,
+    "TagNameProvided":  true,
+    "LookbackMinutes":  1440,
+    "OpenSuccess":  true,
+    "OpenErrorType":  "NoError",
+    "OpenErrorCode":  "Success",
+    "OpenErrorDescription":  "No error type set",
+    "ConnectedToServer":  true,
+    "ConnectionPending":  false,
+    "ConnectionErrorOccurred":  false,
+    "ConnectionStatusErrorType":  null,
+    "ConnectionStatusErrorCode":  null,
+    "ConnectionStatusErrorDescription":  null,
+    "StartQuerySuccess":  true,
+    "StartQueryErrorType":  "NoError",
+    "StartQueryErrorCode":  "Success",
+    "StartQueryErrorDescription":  "No error type set",
+    "MoveTerminalDescription":  null,
+    "RowCount":  1,
+    "Rows":  [
+                 {
+                     "StartDateTime":  "2026-05-01T13:25:07.3855841Z",
+                     "EndDateTime":  "2026-05-01T13:25:07.3855841Z",
+                     "Quality":  133,
+                     "OpcQuality":  192,
+                     "QualityDetail":  248,
+                     "Value":  0,
+                     "StringValuePresent":  true,
+                     "PercentGood":  100
+                 }
+             ]
+}
+{
+    "ModuleName":  "aahClientManaged.dll",
+    "BaseAddress":  140722710380544,
+    "ModuleMemorySize":  17166336,
+    "FileName":  "C:\\Users\\dohertj2\\Desktop\\histsdk\\current\\aahClientManaged.dll"
+}