Closes #16

core/decode_database.h

@@ -88,11 +88,11 @@ class DecodeDatabase {
 public:
     DecodeDatabase() = default;
     /**
-     * Freeze definitions and build the frame index.
-     * Do not retain mutable aliases into moved input vectors.
-     * @throws std::invalid_argument for duplicate frame keys or signal names.
+     * Copy and validate definitions before building the frame index.
+     * Input aliases cannot modify the snapshot, even for rvalue input.
+     * @throws std::invalid_argument for invalid metadata or duplicate keys.
      */
-    explicit DecodeDatabase(std::vector<DecodeFrame> frames);
+    explicit DecodeDatabase(const std::vector<DecodeFrame> &frames);
 
     /** Borrowed view, valid while this snapshot remains alive and unchanged. */
     const std::vector<DecodeFrame> &GetFrames() const;
@@ -105,7 +105,7 @@ private:
         std::vector<DecodeFrame> frames;
         std::unordered_map<FrameKey, std::size_t, FrameKeyHasher> frameIndexByKey;
 
-        explicit Storage(std::vector<DecodeFrame> definitions);
+        explicit Storage(const std::vector<DecodeFrame> &definitions);
     };
 
     std::shared_ptr<const Storage> storage;