bv.arch.intrinsics locked to first seen architecture in tabs

Version and Platform (required):

• Binary Ninja Version: 5.4.10292-dev Ultimate
• OS: MacOS
• OS Version: 26.5.2
• CPU Architecture: M4 Max

bv.arch.intrinsics is locked to first seen architecture. Opening and switching to another tab with a different architecture binary view keeps the bv.arch.intrinsics from the first seen tab.

Steps To Reproduce:

1. Open binary view in UI with architecture A
2. Note the following in the built-in python interpreter:

>>> bv.arch
<arch: x86_64>
>>> len(bv.arch.intrinsics)
11930

3. Open another binary view in a different tab with architecture B
4. Note the following in the built-in python interpreter:

>>> bv.arch
<arch: x86_64>
>>> len(bv.arch.intrinsics)
11930

The above was repeated with x86, arm64 and hexagon combinations. Doesn't seem to be specific to an architecture.

Expected Behavior:
bv.arch.intrinsics is updated based on the binary view associated with the open tab.

Reproduce the issue by opening binary views with different architectures in separate tabs and checking bv.arch and len(bv.arch.intrinsics) in the built-in Python interpreter. Trace how the active tab supplies bv.arch and its intrinsics; done means switching tabs updates both values to the associated binary view's architecture.