Function loadSliceWithCache

The shared loadX facade template: S-cache restore → internal load → query close-out → S-cache store, with the abort-aware error branch.

• A cached slice is a 1-element ladder under the progressive loaders' key contract; a hit returns the SAME payload object on every same-view call, so the downstream reference-identity commit check turns same-slice revisits into no-ops.
• The store clones (helper responsibility — the decoded arrays alias the loader's reused accumulator). Aborted loads throw and never reach it.
• A superseded scrub aborts the in-flight read on purpose; runLoaderUpdates classifies it as 'superseded' (not a failure), so the error branch does not inflate the error counter or flood the monitor's error stream for abort errors — but it ALWAYS finishes query tracking (removes the active query, records timing).

loadInternal receives the generated queryId/startTime so it can register the active query itself (its registration must precede the array loads — recordLoadMetrics reads the first active query's startTime).