update win-update-registry.ps1 to v1.3

[Tony Mocanu (anmocanu)]

v1.3: [August 2026] - Restricted offline hive mounts to HKLM and HKU.
                      - Uses native command exit codes as the authoritative load/unload result.
                      - Creates the hive backup before loading and rolls back failed writes.
                                            - Requires explicit opt-in before creating a missing registry path.
                      - Aligns repair-host disk exclusion and Windows target validation with
                        win-sac-onLatest, win-LKGC, GA_offlinefixer, and win-chkdsk-fs-corruption.
                                                - Verifies temporary mounts by access path and cleans up failed assignments.
                                                - Uses typed temporary-mount records for Windows PowerShell 5.1 compatibility.
                                                  - Resolves the active ControlSet independently for each attached Windows disk.
                                                  - Reads back and verifies the requested registry value before reporting success. v1.2: [Jul 2026] - Updated the script - Fixed DEP-01: Added Get-PSCallStack fallback when PSScriptRoot is empty (e.g. when az vm repair run delivers the script as a ScriptBlock). Emits a clear diagnostic and returns before constructing any helper paths. v1.1: [May 2026] - Fixed Get-VM failure when Hyper-V module is not available on host. - Added guarded nested VM validation with safe fallback logging. - Added explicit runtime parameter validation for rootKey, propertyType, controlSet, and required inputs. - Updated helper import to Get-Disk-Partitions-v2 and aligned partition processing flow. - Added rescue OS drive exclusion to avoid modifying the running rescue VM hive. - Added per-partition reg load failure handling (skip bad partition, continue others). - Added structured step-by-step logging, timestamped desktop log output, and final status tracking. - Improved error handling to continue processing partitions safely and report aggregate result. v1.0: Initial version

[Tony Mocanu (anmocanu)]

testing