Reset version to 1.0.0 and add TODO/CHANGELOG

Reset all Path A script versions from 3.x to 1.0.0 following architectural
decision to treat this as a fresh stable baseline after the Path B cleanup.
Added TODO.md with prioritized audit findings and replaced the old CHANGELOG
with a clean stub.

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

lib/common.sh

@@ -2,7 +2,7 @@
 
 # HOPS - Common Utility Functions
 # Shared functions for logging, error handling, and UI
-# Version: 3.2.0
+# Version: 1.0.0
 
 # Prevent multiple sourcing
 if [[ -n "${HOPS_COMMON_LOADED:-}" ]]; then
@@ -101,7 +101,7 @@ show_hops_header() {
     local subtitle="$2"
     
     if [[ -z "$version" ]]; then
-        version="3.2.0"
+        version="1.0.0"
     fi
     
     clear