[matrixarkai]

Summary

• retain up to 32 verified data-group connections for one wide object write
• reuse those connections for data without enlarging the eight-entry persistent cache
• add a 32-group connection regression test and a 51-process sixteen-group recovery workload
• document the deterministic connection reduction and the measured local run

With default four-group concurrency, a cold 32-group write now establishes 32 data connections instead of 52.

Validation

• cargo test -j1 --all-features --test object_writer_connections -- --test-threads=1 — 21 passed
• cargo check -j1 --all-targets --all-features — passed
• cargo test -j1 --all-features --lib -- --test-threads=1 — 726 passed, 33 ignored measurements
• release WSL recovery workload — 51 processes, 16 data groups, 80 recovered objects, zero retries

The release workload wrote 64 initial 16 KiB objects at 15.2 objects/s and 16 post-failover objects at 32.1 objects/s, then verified all objects after total restart.