* fix deltas of tool_call.function.name * fix tool_call.id (was in tool_call.function.id!) + add function type * add tool_call.type * populate empty tool_call.function.arguments on first delta
* fix deltas of tool_call.function.name * fix tool_call.id (was in tool_call.function.id!) + add function type * add tool_call.type * populate empty tool_call.function.arguments on first delta