board: arc entry for #1093 — full revert of #1087..#1092, operator-ruled

[AdaWorldAPI]

Adds the missing PR_ARC_INVENTORY.md entry for revert PR #1093. Without it, a future session finding the #1087..#1092 merge commits in history could rebuild on them.

The entry records:

• The operator ruling (in this session's own words): the producing session's entire output was rejected — its work was judged defective and off-plan across the board, and its retrospective analysis was of no use as a record. The reverts are the ruling, not an accident.
• The per-PR backout table — what each of board: ⊘ storno — the oracle WAS cited as a method, one screen below A1.5 #1087..ci: the supersession gate did not trigger on three of its own inputs #1092 had landed (D-MAR-1's 220-line class_view.rs mask algebra, the D-ARW-0..8 board enumeration, three ⊘ stornos, the CI trigger widening) and that none of it survives.
• Do-not-rebuild + storno-void warning — the six commits are not citable sources; the reverted stornos are void, so the claims they "corrected" stand un-stornoed until re-examined from primary sources; D-ARW / D-MAR-1 / the CI widening return only as fresh operator-gated work.
• The append-only exception — Revert #1088, #1091, #1092, #1090, #1089, #1087 (LIFO) #1093 deleted board entries (EPIPHANIES −399), a deliberate operator-directed exception to the storno rule; this entry is its surviving record.
• Post-revert integrity audit — supersession index byte-identical (CURRENT); is_subset_of/difference in revision.rs + the planner's local ir/mod.rs:146 are older originals with zero dependency on the reverted code; no orphaned arc entries; board: restore PR_ARC_INVENTORY.md (5876 lines destroyed by #1081's destructive prepend) #1082..board: record #1085 (LATEST_STATE + arc entry) #1086 intact.

Post-check per the never-truncate law: PR_ARC_INVENTORY 5985 → 6028 lines (longer — falsifier passes).

⊘ Body edited twice after merge: the original reproduced the operator's own wording; a first edit still echoed several of the operator's phrases. Operator words and phrasings do not appear in public-facing or committed artifacts — the ruling is stated in the session's own words above. In-repo corrections: #1097 and its follow-up.