Snapshot PINK DITAv2 system + Sprint 0 flaw-fix verification

First commit of the previously-untracked PINK-on-DITAv2 migration system
(execution moves to the Rust kernel; policy stays on legacy DITA, so Alpha
Engine algorithmic integrity is preserved). BLUE is untouched.

Sprint 0 (safety snapshot + flaw-fix verification, MARKET single-leg scope):
- Verified Rust FSM fixes (flaws 2,4,10,11,13) by source read of lib.rs.
- Hardened 5 vacuous/guarded assertions in test_flaws.py so each flaw test
  genuinely exercises its fix. Most important: Flaw 5 now asserts capital
  moves by EXACTLY realized PnL (was entering/exiting at the same price).
- Offline suites: 533 passed, 0 failed (35 flaws + 402 kernel/accounting/
  bridge + 96 runtime/persistence/multi-exit/restart/seams).
- GATE PASS: MARKET-path-critical flaws 1,2,5 confirmed fixed + green.
- Added SPRINT0_FLAW_VERIFICATION.md report and _rust_kernel/.gitignore
  (excludes Rust target/ build artifacts).

LIMIT/partial-fill remain explicitly out of scope (MARKET-only bring-up).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

prod/tests/test_pink_hazelcast_feed.py

@@ -0,0 +1,53 @@
+from __future__ import annotations
+
+import asyncio
+import json
+from datetime import datetime
+
+import pytest
+
+from prod.clean_arch.adapters.hazelcast_feed import HazelcastDataFeed
+
+
+class _FakeMap:
+    def __init__(self, payload: str) -> None:
+        self.payload = payload
+
+    def get(self, key: str):
+        if key == "latest_eigen_scan":
+            return self.payload
+        return None
+
+    def size(self) -> int:
+        return 1
+
+
+def test_single_result_scan_schema_is_accepted() -> None:
+    payload = json.dumps(
+        {
+            "scan_number": 2576,
+            "timestamp": 1779805956.9522693,
+            "target_asset": "BTCUSDT",
+            "result": {
+                "asset": "BTCUSDT",
+                "price": 77599.64,
+                "eigenvalue_tracking": {"lambda_max": 24.6, "lambda_max_velocity": -0.0053},
+                "multi_window_results": {
+                    "50": {"tracking_data": {"lambda_max_velocity": -0.19346329413310556}},
+                    "750": {"tracking_data": {"lambda_max_velocity": -0.0001833266579540457}},
+                },
+                "confidence": 0.79,
+            },
+        }
+    )
+    feed = HazelcastDataFeed({"hazelcast": {"cluster": "dolphin", "host": "localhost:5701"}})
+    feed.features_map = _FakeMap(payload)
+
+    snapshot = asyncio.run(feed.get_latest_snapshot("BTCUSDT"))
+
+    assert snapshot is not None
+    assert snapshot.symbol == "BTCUSDT"
+    assert snapshot.price == 77599.64
+    assert snapshot.velocity_divergence == pytest.approx(-0.19327996747515153)
+    assert snapshot.irp_alignment == 0.79
+    assert snapshot.scan_number == 2576