Mixing backtick escapes and macro token pasting in C source type definition causes a freeze

Version and Platform (required):

• Binary Ninja Version: [e.g. 4.0.4000-dev] (if version is stable, please also test the latest development build via the "Update Channel" option)
• OS: Windows 11
• OS Version: 10.0.26090
• CPU Architecture: x64

Bug Description:
When using "Create Types from C Source" function, attempting to define escaped "template-like" type names using macros will throw binary ninja into "not responding" state, forcing a process kill.

Steps To Reproduce:
Please provide all steps required to reproduce the behavior:

1. Use "Create Types from C Source" function
2. Provide follwing type definition:

#define K_TY int32_t
#define V_TY int16_t

#define ENTRY_TY(K,V) `map_entry<`##K##`,`##V##`>`

struct ENTRY_TY(K_TY,V_TY)
{
    K_TY key;
    V_TY value;
};

3. Click on "Create"
4. Binaryninja freezes

Expected Behavior:
A type named map_entry<int32_t,int16_t> should be created.

Binary:
Reproducible on any binary, including fresh "New Binary Data" context.

Start with the Create Types from C Source entry point and reproduce the freeze using the provided ENTRY_TY macro definition in a fresh New Binary Data context. Trace the type parsing and macro token-pasting path, then verify that creation completes and produces a type named map_entry<int32_t,int16_t> without Binary Ninja becoming unresponsive.