Fix critical flaw: actually use error-based detection results

MAJOR FIX: The error detection function was calculating the correct
recovery level, but the show_recovery_options() function was NOT using
the results - it was still using the old level-based progression logic.

Changes:
1. Missing files section (lines 435-445):
   - Now calls detect_recovery_level_from_errors()
   - Displays "Error analysis recommends: Force Recovery Level X"
   - Shows the recommended level to user prominently

2. Redo log incompatibility section (lines 568-615):
   - Now calls detect_recovery_level_from_errors()
   - Shows "Error analysis recommends: Force Recovery Level X"
   - Correctly uses Level 5 (not hardcoded Level 6)
   - Explains consequences of that level

3. Corruption section (lines 599-675):
   - Now uses recommended_level to determine what to display
   - Shows "Try Force Recovery Level X" based on detection
   - Only shows escalation levels up to recommended_level
   - Marks the detected level with "RECOMMENDED" indicator

Impact:
- Error detection now drives the actual user-facing recommendations
- Recovery level selection is now truly intelligent, not just level progression
- User gets the right recommendation based on error TYPE, not guesswork
- Escalation happens only if user retries at the same level

All 3 error paths now properly use error-based detection results.

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

modules/backup/mysql-restore-to-sql.sh

@@ -435,6 +435,12 @@ show_recovery_options() {
         print_error "DIAGNOSIS: Missing or unopenable tablespace files"
         echo ""
 
+        # Use error-based detection to confirm recovery level recommendation
+        local detection_result=$(detect_recovery_level_from_errors "$error_log" "$current_recovery")
+        local recommended_level=$(echo "$detection_result" | cut -d'|' -f1)
+        echo "Error analysis recommends: Force Recovery Level $recommended_level"
+        echo ""
+
         # Parse error log to find EXACT missing files
         echo "Analyzing error log for missing files..."
         echo ""
@@ -568,6 +574,12 @@ show_recovery_options() {
     elif [ -n "$redo_incompatible" ]; then
         print_error "DIAGNOSIS: Redo log incompatibility"
         echo ""
+
+        # Use error-based detection to recommend appropriate recovery level
+        local detection_result=$(detect_recovery_level_from_errors "$error_log" "$current_recovery")
+        local recommended_level=$(echo "$detection_result" | cut -d'|' -f1)
+        local error_type=$(echo "$detection_result" | cut -d'|' -f2)
+
         echo "Common causes:"
         echo "  - Backup from different MySQL version"
         echo "  - Mixed redo log formats (8.0.30 vs older)"
@@ -575,7 +587,7 @@ show_recovery_options() {
         echo ""
         print_warning "RECOMMENDED ACTIONS:"
         echo ""
-        echo "  Option 1: Start Fresh with Correct Redo Logs"
+        echo "  Option 1: Start Fresh with Correct Redo Logs (PREFERRED)"
         echo "  ────────────────────────────────────────────────"
         echo "    1. Remove current redo logs:"
         if [ -d "$datadir/#innodb_redo" ]; then
@@ -590,10 +602,15 @@ show_recovery_options() {
         echo ""
         echo "    3. Re-run this script"
         echo ""
-        echo "  Option 2: Force Recovery (if redo logs are lost)"
+        echo "  Option 2: Force Recovery (if redo logs are lost/unavailable)"
         echo "  ────────────────────────────────────────────────"
-        echo "    Some data loss may occur, but better than nothing"
+        echo "    Error analysis recommends: Force Recovery Level $recommended_level"
-        echo "    Re-run script and select Force Recovery Level 6"
+        echo "    Re-run script and select recovery mode $recommended_level"
+        echo ""
+        if [ "$recommended_level" -ge 5 ]; then
+            echo "    WARNING: This recovery level will skip log redo operations"
+            echo "    Some recent transactions may be lost or incomplete"
+        fi
         echo ""
 
     elif [ -n "$corruption_detected" ]; then
@@ -610,43 +627,50 @@ show_recovery_options() {
         local level_4_desc="Prevents insert buffer merge operations"
         local level_6_desc="Skips page checksums (maximum recovery, most data loss risk)"
 
-        print_warning "RECOMMENDED ACTIONS (IN ORDER):"
+        print_warning "RECOMMENDED ACTION (from error analysis):"
+        echo "  ✓ Try Force Recovery Level $recommended_level"
+        echo ""
+        print_warning "STEP-BY-STEP PROGRESSION:"
         echo ""
 
-        # If we haven't tried any recovery yet, start with level 1
+        # Show all levels up to and including the recommended level
-        if [ "$current_recovery" = "0" ] || [ -z "$current_recovery" ]; then
+        # This helps user understand the escalation path if needed
+
+        # Level 1
+        if [ "$recommended_level" -ge 1 ]; then
             echo "  Step 1: Try Force Recovery Level 1"
             echo "  ────────────────────────────────────────────────"
             echo "    Re-run script → Step 4 → Select recovery mode 1"
             echo "    $level_1_desc"
-            echo ""
+            if [ "$recommended_level" -eq 1 ]; then
-            echo "  (If level 1 fails, proceed to level 4)"
+                echo "    ^ RECOMMENDED (error analysis suggests this level)"
+            fi
             echo ""
         fi
 
-        # If level 1 was tried, recommend level 4
+        # Level 4 (skip 2 and 3 as they're less commonly needed for corruption)
-        if [ "$current_recovery" = "1" ]; then
+        if [ "$recommended_level" -ge 4 ]; then
-            echo "  Step 1: Try Force Recovery Level 4"
+            echo "  Step 2: If Level 1 Fails, Try Force Recovery Level 4"
             echo "  ────────────────────────────────────────────────"
             echo "    Re-run script → Step 4 → Select recovery mode 4"
             echo "    $level_4_desc"
-            echo ""
+            if [ "$recommended_level" -eq 4 ]; then
-            echo "  (If level 4 fails, proceed to level 6)"
+                echo "    ^ RECOMMENDED (error analysis suggests this level)"
+            fi
             echo ""
         fi
 
-        # If level 4+ was tried, recommend level 6 (last resort)
+        # Level 6 (last resort)
-        if [ "${current_recovery:-0}" -ge 4 ]; then
+        if [ "$recommended_level" -ge 6 ]; then
-            echo "  Step 1: Try Force Recovery Level 6 (LAST RESORT)"
+            echo "  Step 3: If Level 4 Fails, Try Force Recovery Level 6 (LAST RESORT)"
             echo "  ────────────────────────────────────────────────"
             echo "    Re-run script → Step 4 → Select recovery mode 6"
             echo "    $level_6_desc"
-            echo ""
+            echo "    ^ RECOMMENDED (error analysis suggests this level - MAX DATA RISK)"
-            echo "  NOTE: This may recover more data but at risk of data consistency"
             echo ""
         fi
 
-        echo "  Step 2: If All Recovery Levels Fail"
+        echo "  Step 4: If All Recovery Levels Fail"
         echo "  ────────────────────────────────────────────────"
         echo "    1. Corruption may be in the backup itself"
         echo "    2. Try restoring from an older backup date"