feat(thressgame-coverage): Wave 19 (close 6 production gaps, lift all fixmes)

T85: Wired Wave 12 move-gen attrs into engine.ts:getAllLegalMoves (the path the drag UI actually uses):
- BlockAllExceptKing (game-level early-return)
- BlockedPieceTypes (game-level early-return)
- MovesAs (per-piece substitution via lookupMoveGenerator)
- MovesAlsoAs (additive; deduped via dedupeMoves helper)
- MoveClassRestriction (post-filter on the entire move set)

Previously these attrs only filtered rules/turn.ts:getLegalMovesForPiece, but the production drag path goes through engine.ts. Now both paths apply identical filters.

T86: engine.ts:applyMove now honors isPawnPush:
- pushedPieceId moved to pushedTo (defender shoved forward)
- pawn moves to diagonal target square (no capture retract)
- HasMoved set on pawn
- Hook firing + turn advancement preserved

5 fixmes lifted in move-gen-attrs.spec.ts (MovesAs, MovesAlsoAs, BlockedPieceTypes, MoveClassRestriction, PawnPushesPiecesEnabled).
1 fixme lifted in orphan-primitives.spec.ts (must-class consumer now active).

E2E status: 30/30 thressgame-coverage tests PASS. 0 fixmes. 0 skips.
Unit tests: 2866 -> 2868 (+2 from new applyMove unit tests). bun run check exit 0.

.sisyphus/boulder.json

@@ -98,7 +98,10 @@
     "ses_233f7318effe2R0Vt2ad27KzEZ",
     "ses_233cc34d1ffe9ys7V39oRNCcO0",
     "ses_233bcb2b3ffeI06xdt1zAAeqig",
-    "ses_233bc366effeMrTyc60acFDGv1"
+    "ses_233bc366effeMrTyc60acFDGv1",
+    "ses_233bbae40ffeT1NSqk255jg4hM",
+    "ses_233064ca7ffeXlINJom4KihOqH",
+    "ses_23305e63fffeSljlU1lOZqw7VE"
   ],
   "plan_name": "thressgame-coverage",
   "agent": "atlas"