v0.0.15: the audit response, and spec-order calls by default

Method calls now evaluate in specification order by default; the fused lowering that could be observed by a getter or proxy trap is used only where argument shapes provably cannot see it.

v0.0.15 (e6e0f65d) bundles tickets B280 through B288: spec-order method calls by default, an accel spec grammar, transactional host.call, zippProfile() so a host can tell which build it loaded, and a CI gate. B280 is the one with a price: ZIPP_RELAXED_CALL_ORDER=1 still exists as a diagnostic and is documented as observably wrong for a getter or proxy trap, and it will never ship. The performance cost showed up in the 11 September capture.