Per-loader context for the shared facade helpers. Built once in each loader's constructor; every field is a stable reference or a this-bound accessor, so the ctx never goes stale.
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The loader's live metrics record (mutated in place).
The loader's active-query map (mutated in place).
Loader type literal for emitted events.
Node path (S-cache namespace + event payload).
Shared S-cache; null for progressive sub-LOD instances.
Monotonic per-loader counter for same-millisecond queryId uniqueness.
Current accumulator allocation in MB (0 when absent).
Emit a monitor event through the loader's listener set.
Per-loader context for the shared facade helpers. Built once in each loader's constructor; every field is a stable reference or a
this-bound accessor, so the ctx never goes stale.