make batch operations work

ARCHITECTURE.md

@@ -170,24 +170,6 @@ Encoded as:
   30                // value bytes (stored as string)
 ```
 
-## Module Structure
-
-```
-jormundb/
-├── main.odin           # Entry point, HTTP server
-├── rocksdb/            # RocksDB C FFI bindings
-│   └── rocksdb.odin    # db_open, db_put, db_get, etc.
-├── dynamodb/           # DynamoDB protocol implementation
-│   ├── types.odin      # Core types (Attribute_Value, Item, Key, etc.)
-│   ├── json.odin       # DynamoDB JSON parsing/serialization
-│   ├── storage.odin    # Storage engine (CRUD, scan, query)
-│   └── handler.odin    # HTTP request handlers
-├── key_codec/          # Binary key encoding
-│   └── key_codec.odin  # build_data_key, decode_data_key, etc.
-└── item_codec/         # Binary TLV item encoding
-    └── item_codec.odin # encode, decode
-```
-
 ## Request Flow
 
 ```