docs(audit): Client.CLI.md — verb/flag accuracy pass

CODE-REALITY: verified all 8 verbs + flags against src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI/.
Verb set confirmed exact (connect/browse/read/write/subscribe/historyread/alarms/redundancy);
common options (-u/-U/-P/-S/-F/--verbose) match CommandBase.cs:32-64; per-command flags all match.

Fixes:
- Aggregate map: StandardDeviation maps to AggregateFunction_StandardDeviationPopulation,
  not ...Sample (AggregateTypeMapper.cs:26). Doc table corrected.
- STALE: test count 52 -> 77 (77 [Fact] across tests/Client/...CLI.Tests, no Theory).

STRUCTURAL: links-report.md had no rows for docs/Client.CLI.md; check_links.py clean.
Executable name otopcua-cli is the CliFx SetExecutableName (Program.cs:12); csproj has no
AssemblyName, so dotnet-run invocation in CLAUDE.md is correct — no change.

docs/Client.CLI.md

@@ -219,7 +219,7 @@ otopcua-cli historyread -u opc.tcp://localhost:4840/OtOpcUa \
 | `Count` |  | `AggregateFunction_Count` |
 | `Start` | `first` | `AggregateFunction_Start` |
 | `End` | `last` | `AggregateFunction_End` |
-| `StandardDeviation` | `stddev`, `stdev` | `AggregateFunction_StandardDeviationSample` |
+| `StandardDeviation` | `stddev`, `stdev` | `AggregateFunction_StandardDeviationPopulation` |
 
 ### alarms
 
@@ -261,7 +261,7 @@ Application URI:  urn:localhost:OtOpcUa:instance1
 
 ## Testing
 
-The Client CLI has 52 unit tests covering option parsing, service invocation, output formatting, and cleanup behavior:
+The Client CLI has 77 unit tests covering option parsing, service invocation, output formatting, and cleanup behavior:
 
 ```bash
 dotnet test tests/Client/ZB.MOM.WW.OtOpcUa.Client.CLI.Tests