Bump version to 1.2.0 and update changelog

Update version number and document all changes from the
issue fixes including new features, bug fixes, and
performance improvements.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -73,6 +73,8 @@ curl -sL "http://10.10.10.63:3000/LotusGuild/proxDoc/raw/branch/main/proxDoc.sh"
 - `--vm-list`: Check VM vitals
 - `--ct-list`: Check container vitals
 - `--backup`: Review backup health
+- `--checks=LIST`: Run only specific checks (comma-separated)
+  - Valid checks: cpu, ram, memory, storage, disk, network, hardware, temps, services, ceph, vms, containers
 
 ## Output Information
 
@@ -101,10 +103,26 @@ The script provides detailed information about:
 
 ## Version
 
-Current Version: 1.1.0
+Current Version: 1.2.0
 
 ### Changelog
 
+#### v1.2.0
+- Fixed variable quoting in disk iteration loops (security)
+- Added input validation with whitelist of valid options
+- Added examples to help documentation
+- Added timeout protection to smartctl and ceph commands
+- Added `--checks=` option for selective diagnostics
+- Extracted magic strings into named constants
+- Added validation for potentially empty variables
+- Standardized error handling with cleanup trap
+- Added optional logging infrastructure (PROXDOC_LOGFILE)
+- Cached disk list and unit files to reduce command overhead
+- Added efficient process wait utility function
+- Fixed CPU MHz parsing showing multiple values
+- Fixed memory DIMM table not displaying data
+- Fixed bonding_masters showing as network interface
+
 #### v1.1.0
 - Added DriveAtlas integration (`--drives`) for physical drive bay mapping
 - Added Ceph cluster health monitoring (`--ceph`)