Potential experiments

fix(gateway): reclaim ip connection counts from dead sockets (#2308)

fix(kv): stop multi-key commands spanning cluster slots (#2310)

fix(gateway): bound relay worker mailboxes without reordering (#2309)

perf(gateway): evict presence tombstones in insertion order (#2307)

fix(gateway): stop presence evictions suppressing repair (#2305)

fix(kv): drop the row_key order probe that cliffed paged scans (#2306)

fix(cache): stop a timed out produce pinning its tracking entry (#2304)

fix(kv): stop multi-key commands spanning cluster slots

fix(gateway): bound relay worker mailboxes without reordering

fix(gateway): reclaim ip connection counts from dead sockets

perf(gateway): evict presence tombstones in insertion order

fix(kv): drop the row_key order probe that cliffed paged scans

fix(cache): stop a timed out produce pinning its tracking entry

fix(gateway): stop presence evictions suppressing repair

test(api): build deletion queue users from the real row type (#2303)

test(api): build deletion queue users from the real row type

fix(kv): page scans by keyset so deletes cannot skip rows (#2302)

fix(gateway): stop stale guild connect timers aborting connects (#2301)

fix(gateway): keep dispatch ordered under relay backpressure (#2300)

fix(gateway): stop rate limit tables dying with their creator (#2299)