5 new diagrams (Graphviz DOT → PNG):
benchmark-ack.dot — ack(3,4) across all 5 tiers
benchmark-sumto.dot — sum-to(50k) across all 5 tiers
benchmark-fib.dot — fib(35) iterative across all 5 tiers
benchmark-speedup.dot — JIT speedup ratios (7x-784x)
benchmark-binary-size.dot — 13KB asm vs 171KB C vs ~30MB Python
JIT: 0.19ms ack, 7x faster than CPython, 784x faster than Python VM.
Makefile docs target now auto-discovers all docs/*.dot files.
