Consolidate duplicate functions, bump to v1.0.1

- Remove duplicate log/error_exit/warning/success/info from hops and
  uninstall; remove validate_password, generate_secure_password,
  create_docker_networks, validate_timezone from install. Single
  canonical copies now live in lib/common.sh, lib/security.sh,
  lib/validation.sh, and lib/docker.sh (A5, Q1)
- Fix lib/docker.sh, lib/validation.sh, lib/security.sh to use LIB_DIR
  instead of SCRIPT_DIR so sourcing them inside a function does not
  clobber the caller's SCRIPT_DIR
- Move SCRIPT_VERSION to lib/common.sh as the single source of truth;
  remove local declarations from hops, install, and uninstall
- uninstall now sources lib/common.sh directly for standalone safety
- validate_timezone updated to warn-and-default instead of error_exit
- validate_password updated to handle empty input (return 3)
- Update CHANGELOG and TODO to reflect resolved items (B1-B6, A1, A3,
  A5, Q1) and bump version to 1.0.1

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

uninstall

@@ -8,29 +8,15 @@ uninstall_hops() {
     set +e
 
     # Script version for consistency
-    local SCRIPT_VERSION="1.0.0"
+    local _UNINSTALL_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+    # Load shared utilities if not already loaded (allows standalone execution)
+    source "$_UNINSTALL_DIR/lib/common.sh"
 
     # --------------------------------------------
     # LOGGING SETUP
     # --------------------------------------------
-    local LOG_DIR="/var/log/hops"
-    local LOG_FILE="$LOG_DIR/hops-uninstall-$(date +%Y%m%d-%H%M%S).log"
-    mkdir -p "$LOG_DIR"
-    touch "$LOG_FILE"
-
-    log() {
-        echo -e "$(date '+%Y-%m-%d %T') - $1" | tee -a "$LOG_FILE"
-    }
-
-    error_exit() {
-        log "❌ ERROR: $1"
-        log "❌ Uninstallation failed. Check logs at: $LOG_FILE"
-        exit 1
-    }
-
-    warning() {
-        log "⚠️ WARNING: $1"
-    }
+    setup_logging "hops-uninstall"
 
     # --------------------------------------------
     # HEADER