Refactor variable assignments and improve script readability in validate-plex-backups.sh and validate-plex-recovery.sh

- Changed inline variable assignments to separate declaration and assignment for clarity.
- Updated condition checks and log messages for better readability and consistency.
- Added a backup of validate-plex-recovery.sh for safety.
- Introduced a new script run-docker-tests.sh for testing setup in Docker containers.
- Enhanced ssh-login.sh to improve condition checks and logging functionality.

immich/test-immich-restore.sh

@@ -8,7 +8,6 @@ set -e
 # Colors for output
 RED='\033[0;31m'
 GREEN='\033[0;32m'
-YELLOW='\033[0;33m'
 BLUE='\033[0;34m'
 NC='\033[0m' # No Color
 
@@ -215,7 +214,8 @@ test_env_validation() {
     log_test "Environment Variable Validation"
 
     # Temporarily move .env file to test missing env
-    local env_file="$(dirname "$RESTORE_SCRIPT")/../.env"
+    local env_file
+    env_file="$(dirname "$RESTORE_SCRIPT")/../.env"
     if [ -f "$env_file" ]; then
         mv "$env_file" "${env_file}.backup"
 
@@ -285,11 +285,12 @@ test_logging() {
     TESTS_RUN=$((TESTS_RUN + 1))
     log_test "Logging Functionality"
 
-    local log_dir="$(dirname "$RESTORE_SCRIPT")/../logs"
+    local log_dir
+    log_dir="$(dirname "$RESTORE_SCRIPT")/../logs"
     local restore_log="${log_dir}/immich-restore.log"
 
     # Clear previous log entries
-    [ -f "$restore_log" ] && > "$restore_log"
+    [ -f "$restore_log" ] && true > "$restore_log"
 
     local mock_db_backup="${TEST_DIR}/mock_immich_db_backup_20250603_120000.sql.gz"
     local mock_uploads_backup="${TEST_DIR}/mock_immich_uploads_20250603_120000.tar.gz"
@@ -330,10 +331,12 @@ test_performance() {
     done
     tar -czf "$large_uploads_backup" -C "${TEST_DIR}" large_mock_uploads
 
-    local start_time=$(date +%s)
+    local start_time
+    start_time=$(date +%s)
     local output
     if output=$("$RESTORE_SCRIPT" --db-backup "$large_db_backup" --uploads-backup "$large_uploads_backup" --dry-run 2>&1); then
-        local end_time=$(date +%s)
+        local end_time
+        end_time=$(date +%s)
         local duration=$((end_time - start_time))
 
         if [ $duration -lt 30 ]; then  # Should complete dry run in under 30 seconds