VendorApproach.TryParse reads the vendor profile and the item list per
the byte-verified field table (research doc §A.2), each item through
the shared PublicWeenieDescParser from 5.0 — zero duplicated parsing.
One wire detail the research table did not spell out, found by
re-reading ACE's writer and confirmed independently in Chorizite's
generated readers: every object body is 4-byte-aligned at its END, so
back-to-back vendor items need an explicit AlignTo4 between entries
(CreateObject never needed it — nothing follows its body). Pinned by a
dedicated test forcing a real 2-byte misalignment via AmmoType.
Stack-size sign extension cross-checked against holtburger.
Six tests: field-order with distinct literals, empty list, and
truncation at each structural boundary — mid-item-tail truncation
deliberately inherits 5.0's established non-throwing partial-item
contract instead of asserting null everywhere.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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