fix: Update stale v8.0.1 references to v9.0.0 and fix SSH docs

- RepoHerd.psm1: version header and $script:Version updated to 9.0.0
- RepoHerd.ps1: SSH notes updated to reflect cross-platform support
  (PuTTY on Windows, OpenSSH on macOS/Linux)
- CLAUDE.md: version updated to 9.0.0
- Unit and integration tests: toolVersion assertion updated to 9.0.0

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: AndreaV-Lsi

CLAUDE.md

@@ -2,7 +2,7 @@
 
 ## Project Overview
 
-PowerShell-based dependency management tool that checks out multiple Git repositories to specified versions. Module architecture: `RepoHerd.psm1` (functions) + `RepoHerd.ps1` (entry point). Version 8.0.1, by LS Instruments AG.
+PowerShell-based dependency management tool that checks out multiple Git repositories to specified versions. Module architecture: `RepoHerd.psm1` (functions) + `RepoHerd.ps1` (entry point). Version 9.0.0, by LS Instruments AG.
 
 ## Running the Tool
 

RepoHerd.ps1

@@ -52,8 +52,8 @@
     Requires PowerShell 7.6 LTS or later (installs side-by-side with Windows PowerShell 5.1).
     Install via: winget install Microsoft.PowerShell
 
-    This script uses PuTTY/plink for SSH authentication. SSH keys must be in PuTTY format (.ppk).
-    Use PuTTYgen to convert OpenSSH keys to PuTTY format if needed.
+    SSH authentication is cross-platform: PuTTY/plink with .ppk keys on Windows,
+    OpenSSH on macOS/Linux. Use PuTTYgen to convert OpenSSH keys to .ppk format on Windows.
 #>
 
 [CmdletBinding()]

RepoHerd.psm1

@@ -1,11 +1,11 @@
 # RepoHerd Module
 # Contains all function definitions for RepoHerd tool
-# Version 8.0.1
+# Version 9.0.0
 
 #Requires -Version 7.6
 
 # Module-scoped state variables
-$script:Version = "8.0.1"
+$script:Version = "9.0.0"
 $script:ScriptPath = ""
 $script:ErrorFile = ""
 $script:DebugLogFile = ""

tests/RepoHerd.Integration.Tests.ps1

@@ -145,7 +145,7 @@ Describe 'RepoHerd Integration Tests' -Tag 'Integration' {
         $result.schemaVersion | Should -Be '1.0.0'
 
         # Metadata
-        $result.metadata.toolVersion | Should -Be '8.0.1'
+        $result.metadata.toolVersion | Should -Be '9.0.0'
         $result.metadata.recursiveMode | Should -Be $true
         $result.metadata.apiCompatibility | Should -BeIn @('Strict', 'Permissive')
         $result.metadata.powershellVersion | Should -Not -BeNullOrEmpty

tests/RepoHerd.Unit.Tests.ps1

@@ -451,7 +451,7 @@ Describe 'Export-CheckoutResults' {
         Export-CheckoutResults -OutputFile $outputFile
 
         $result = Get-Content $outputFile -Raw | ConvertFrom-Json
-        $result.metadata.toolVersion | Should -Be '8.0.1'
+        $result.metadata.toolVersion | Should -Be '9.0.0'
         $result.metadata.recursiveMode | Should -Be $true
         $result.metadata.maxDepth | Should -Be 5
         $result.metadata.apiCompatibility | Should -Be 'Permissive'