fix: handle NumberFormatException in version parsing

Add try-catch blocks to handle potential NumberFormatException when
parsing version numbers from index names and version strings.

- IndexMigrationService.getCurrentIndexVersion(): wrap Integer.parseInt
  with try-catch and log warning on failure, returning 0 as default
- VersionService.getNextVersion(): wrap all three Integer.parseInt calls
  with try-catch blocks, using sensible defaults (1.0.0)

Author: bsbodden

redis-om-spring/src/main/java/com/redis/om/spring/indexing/IndexMigrationService.java

@@ -318,7 +318,12 @@ public int getCurrentIndexVersion(Class<?> entityClass) {
     Matcher matcher = VERSION_PATTERN.matcher(currentIndexName);
 
     if (matcher.find()) {
-      return Integer.parseInt(matcher.group(1));
+      try {
+        return Integer.parseInt(matcher.group(1));
+      } catch (NumberFormatException e) {
+        logger.warn("Failed to parse index version from name '{}': {}", currentIndexName, matcher.group(1));
+        return 0;
+      }
     }
 
     return 0; // No version found, assume version 0

tests/src/test/java/com/redis/om/spring/services/VersionService.java

@@ -71,9 +71,27 @@ public boolean isMajorVersion() {
      * @return the next version string
      */
     public String getNextVersion(String incrementType) {
-        int major = Integer.parseInt(getMajorVersion());
-        int minor = Integer.parseInt(getMinorVersion());
-        int patch = Integer.parseInt(getPatchVersion());
+        int major;
+        int minor;
+        int patch;
+
+        try {
+            major = Integer.parseInt(getMajorVersion());
+        } catch (NumberFormatException e) {
+            major = 1;
+        }
+
+        try {
+            minor = Integer.parseInt(getMinorVersion());
+        } catch (NumberFormatException e) {
+            minor = 0;
+        }
+
+        try {
+            patch = Integer.parseInt(getPatchVersion());
+        } catch (NumberFormatException e) {
+            patch = 0;
+        }
 
         switch (incrementType.toLowerCase()) {
             case "major":