repo hygiene: track the PINK launcher import closure

67 production .py modules that the running PINK service imports but which
were never committed: prod/bingx/ (HTTP client, market/user streams,
journal, config), prod/clean_arch/ adapters/persistence/runtime/dita/dita_v2
production modules and their co-located tests. Rule going forward: every
module imported by launch_dolphin_pink.py / pink_direct.py must appear in
git ls-files. Excludes _backup dirs, __pycache__, and non-code files.

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

prod/clean_arch/dita_v2/utils.py

@@ -0,0 +1,43 @@
+"""Utility helpers for the DITAv2 kernel."""
+
+from __future__ import annotations
+
+from dataclasses import asdict, is_dataclass
+from datetime import datetime
+from enum import Enum
+from typing import Any
+import json
+import math
+
+
+def safe_float(value: Any, default: float = 0.0) -> float:
+    """Return a finite float or ``default``."""
+    try:
+        out = float(value)
+    except Exception:
+        return default
+    if not math.isfinite(out):
+        return default
+    return out
+
+
+def json_safe(value: Any) -> Any:
+    """Convert enums, dataclasses and datetimes to JSON-safe objects."""
+    if isinstance(value, Enum):
+        return value.value
+    if isinstance(value, datetime):
+        return value.isoformat()
+    if is_dataclass(value):
+        return json_safe(asdict(value))
+    if isinstance(value, dict):
+        return {str(key): json_safe(val) for key, val in value.items()}
+    if isinstance(value, list):
+        return [json_safe(item) for item in value]
+    if isinstance(value, tuple):
+        return [json_safe(item) for item in value]
+    return value
+
+
+def json_text(value: Any) -> str:
+    """Serialize a value using stable JSON settings."""
+    return json.dumps(json_safe(value), separators=(",", ":"), ensure_ascii=False, default=str)