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ch_writer: _writer_violet (db=dolphin_violet) + ch_put_violet, the existing per-strategy singleton pattern. bingx/journal: explicit violet entries in _STRATEGY_DB_MAP/_SINK_MAP/_SINK_NAME_MAP — closes the hazard where the unknown-strategy fallback routes venue journals into BLUE's dolphin DB (regression-pinned in the new test, which documents the footgun for any future strategy color). test_violet_namespace_isolation: violet sink targets dolphin_violet exclusively; journal resolves violet explicitly; Zinc region names for prefix violet disjoint from pink; persistence wired with the violet sink routes only to dolphin_violet; HZ map-name contract pinned for the C4 launcher. Shared-lib regression: 57/57 across PINK kernel/runtime + BLUE tp_floor/malformed-open + bingx http safety. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>