Replaced all 497 Label_XXXX labels with semantic names:
- 37 jmp-target labels renamed with routine-specific names
- 6 branch-target labels renamed with _Loop/_Next/_Block roles
- 454 internal branch targets renamed as <Routine>_Block/_Block_N
based on parent routine and block position
All 84 jsr targets already had semantic names.
Build verified byte-identical. verify_pass1.py passes with 'canoni'
comment format.
Updated TODO.md: removed Balloon Fight from Label_ residue table.
tmerritt
18d44a8883