(OPT) Reduce paid no-saving sequencing-minimum probes without moving the work frontier #858

The Main 44f52ebee749b2877ba001c5398acbf803a277a1 sequencing-minimum optimization is being integrated with the branch's lexical first-output work frontier. The funded port preserves the original work/materialization/capacity-payment order and pays a complete additional scalar receiving envelope before querying the remaining suffix iterator or forming helper arguments.

Static review identified a real no-saving shape: P=9 prefixes and S=2 suffixes have original C=16 and proved D=16. The added probe therefore pays its receiving fee without removing a backing allocation. Selected-admission fallback also pays before declining the new optimization. This is source-level evidence from an unqualified implementation, not a measured current-head regression, application result, or agent-token result.

Optimize the no-saving/common cases while retaining the useful P+S-1 minimum:

• Measure the actual allocation ledger, physical allocations, work, eventual capacity/future growth and complete Drop for qualifying, C=D, selected, unpaid, stopped-first and tiny cases against the complete immediate predecessor.
• Investigate a smaller prepaid query, reuse of already paid scalar state, or a fused lexical admission. Account for every newly introduced argument, reference, Option, boolean, error and return carrier before formation. Do not claim an unpaid header gate or refund earlier costs.
• Preserve the original first work failure and sticky selected status; test zero/exact/one-short/expired-owner and real allocator-floor refusal with all Diagnostic fields intact.
• Keep the independent Main44 and immediate branch receivers and their complete source guards. No bound, builder cap, reservation, fixture or backend check may be weakened.
• Report unfavorable observations alongside savings. Compiler builder bytes are not RSS, agent tokens, or billed cost; any application/agent claim requires the matched live benchmark.

Discovery: astra-main44f-minimum-discovery-20261016.md in this task's external evidence directory; implementation owner src/cleanup_plan/replay/path_array/sequence_minimum.rs (integration pending). This is a separate later optimization from the existing #856 prefix receiving correction.