ic-engine v2.4.4 — test-fix sweep + asset restoration + harness gate.

14 failing tests → 0. 691 passing.

Real production fix: stonkmode-avatars asset bundle (32 .svg +
manifest.json) restored under src/ic_engine/assets/. Was missing since
v2.3.0-rc1 extraction; avatar_manifest() would FileNotFoundError on
installed wheels. setuptools package-data added so assets ship in wheels.

KNOWN ISSUE (v2.4.5 follow-up): 32 SVGs use shared IDs (title, desc,
bg, shadow, avatarClip). When two render side-by-side in HTML,
references bind to the first. Pre-existing in upstream InvestorClaw
asset bundle.