fix: Implement ResetAllDB for LevelDbCache

- Add ResetAllDB virtual method implementation
- Fix abstract class instantiation error
- Maintain consistency with Redis implementation

omnn/storage/LevelDbCache.cpp

@@ -7,7 +7,7 @@
 #include <string>
 
 
-using namespace omnn::rt::storage; 
+using namespace omnn::rt::storage;
 
 
 LevelDbCache::LevelDbCache(const std::string_view& path)
@@ -36,6 +36,20 @@ bool LevelDbCache::Clear(const std::string_view &key) {
 	return _status.ok();
 }
 
+bool LevelDbCache::ResetAllDB(const path_str_t& path) {
+    // Delete all keys in the database
+    auto it = _db->NewIterator(leveldb::ReadOptions());
+    for (it->SeekToFirst(); it->Valid(); it->Next()) {
+        auto status = _db->Delete(leveldb::WriteOptions(), it->key());
+        if (!status.ok()) {
+            delete it;
+            return false;
+        }
+    }
+    delete it;
+    return true;
+}
+
 LevelDbCache::~LevelDbCache() {
 	delete _db;
 }

omnn/storage/LevelDbCache.h

@@ -20,6 +20,7 @@ class LevelDbCache
     std::string GetOne(const std::string_view& key) override;
     bool Set(const std::string_view& key, const std::string_view& v) override;
     bool Clear(const std::string_view& key) override;
+    bool ResetAllDB(const path_str_t& path) override;
     ~LevelDbCache() override;
 
     static const leveldb::Options& GetDbConnectionOptions();