Fix Bool deserialized as number in TS SDK fast path

[clockwork-labs-bot]

Fixes #4591

Root Cause

The isFixedSizeProduct fast-path deserializer in algebraic_type.ts maps Bool to view.getUint8(), which returns a number (0 or 1) instead of a JavaScript boolean. The slow path (reader.readBool()) correctly converts via !== 0.

This means any product type containing only fixed-size primitives (bools, ints, floats) hits the fast path and returns numbers for boolean fields. Products containing strings, arrays, or nested objects go through the slow path and work correctly.

This explains the inconsistency in the issue: a flat { foo: bool } returns { foo: 1 }, but adding a nested object pushes it to the slow path where foo becomes true (though the nested bool still hits the fast path within its own product).

Fix

Special-case Bool in the fast-path code generation to emit:

result.foo = view.getUint8(reader.offset) !== 0;

instead of:

result.foo = view.getUint8(reader.offset);

One-line change in the ternary within makeDeserializer.