[thweetkomputer]

Standalone ZPOPMIN/ZPOPMAX and ZREMRANGE variants now use IX for topology-preserving deletions. Select with temporary S groups, release them, then acquire member X and merged ordered X/S requirements in identity order. Validate the selection's relevant page revisions and retain predicate protection through publication; changed selections fall back once to key X. Unrelated root publications can continue without forcing a retry.

Score ranges and endpoint pops protect their interval and neighbours. Rank and mixed-score lexical removals protect the whole ordered graph because changes elsewhere affect the predicate, while unrelated member reads can continue. Guaranteed page-emptying removals go directly to the structural X path. Multi-key aggregation/STORE, blocking or multi-key pops, compact values and externally locked transactions keep their existing paths.

Validation: Debug and Release builds; 67 focused unit tests and 81 grouped E2E tests pass, including crash recovery, OOM, EXEC and existing command surfaces. New deterministic tests cover selective progress, predicate conflicts, selection invalidation by score changes/deletion, and unrelated publications between selection and mutation.

Stacked on #437; this PR contains only selected deletions and endpoint pops.

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