dont ever use cstring again

TODO.md

@@ -14,22 +14,25 @@ This tracks the rewrite from Zig to Odin and remaining features.
 - [x] Main entry point with arena pattern demo
 - [x] .gitignore
 - [x] HTTP Server Scaffolding
+- [x] JSON Parser
+- [x] Item_codec
+- [x] Storage
 
 ## 🚧 In Progress (Need to Complete)
 
 ### Core Modules
 
-- [ ] **dynamodb/json.odin** - DynamoDB JSON parsing and serialization
+- [x] **dynamodb/json.odin** - DynamoDB JSON parsing and serialization
   - Parse `{"S": "value"}` format
   - Serialize AttributeValue to DynamoDB JSON
   - Parse request bodies (PutItem, GetItem, etc.)
 
-- [ ] **item_codec/item_codec.odin** - Binary TLV encoding for items
+- [x] **item_codec/item_codec.odin** - Binary TLV encoding for items
   - Encode Item to binary TLV format
   - Decode binary TLV back to Item
   - Type tag handling for all DynamoDB types
 
-- [ ] **dynamodb/storage.odin** - Storage engine with RocksDB
+- [x] **dynamodb/storage.odin** - Storage engine with RocksDB
   - Table metadata management
   - create_table, delete_table, describe_table, list_tables
   - put_item, get_item, delete_item