Investigate LOAD_CONST vs LOAD_SMALL_INT / Constant Folding Drift

[youknowone]

Background:
There are repeated differences where LOAD_CONST and LOAD_SMALL_INT/numeric literals
diverge, often accompanied by subsequent stack changes. This likely stems from constant
folding or literal emission policy.

Task:

• Reconcile constant-literal emission rules in compiler constant folding/codegen phases.
• Normalize behavior where CPython would emit constant object vs inline small-int
  opcodes.
• Audit for cases where tuple/list/dict literal assembly diverges (LOAD_CONST shapes,
  tuple packing, slice/build helpers).

Acceptance criteria:

• Large LOAD_CONST-related mismatches reduced, especially in numeric-heavy code paths.
• Bytecode shape remains semantically equivalent for float/int/string constant
  expressions.