PINK kernel fix-of-fixes: slot-PnL repair plumbing

Review of PINK_ACCOUNTING_EXEC_FIX execution found the Phase 3.2 repair
path triply broken: (1) !closed guard blocked repair on terminal fills —
the common price-less case; (2) wrapper on_account_event was a raw FFI
passthrough so repairs never settled into published capital; (3) live
FILL_SETTLED carried no slot_id and realized_pnl=0 (pre-folded) — repair
was dead code. Fixes: repair allowed on closed slots (flag+dedup keep it
idempotent); wrapper settles the baseline diff on FILL_SETTLED-with-slot_id;
dedicated repair_realized_pnl field avoids double-folding the K-ledger;
_FakeKernelAccount fixture mirrors the Phase 1 anchor_to_exchange contract.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

prod/clean_arch/runtime/pink_direct.py

@@ -672,6 +672,14 @@ class PinkDirectRuntime:
                             "realized_pnl": 0.0,  # already folded above
                             "fee": event.fee,     # negative = rebate
                             "is_maker": event.is_maker,
+                            # Slot-level PnL repair plumbing (Phase 3.2): the
+                            # kernel repairs a price-less exit leg
+                            # (realized_skipped_no_price) from the exchange's
+                            # realized figure. Separate field so the K-fold is
+                            # never double-counted; slot 0 = single-slot kernel
+                            # and the fill ownership filter already passed.
+                            "slot_id": 0,
+                            "repair_realized_pnl": float(event.realized_pnl or 0.0),
                         })
                         # Gap 2: log settled fee with WS_SETTLED provenance so
                         # downstream can reconcile against the ESTIMATED_TAKER row.