docs: replay window is 2h by policy; deep replay belongs to stream

zig 0.17: port to the 0.17.0 release

shutdown, broadcaster: never close a socket another fiber is parked on

adopt zio e1fc874: lost poller wakes are re-armed, and export the counter

repro: KILL the schema-bootstrap zlay, detach soak children from the ssh session

fix: bound disk replay per chunk and abort for dead consumers

main: loop-stats diagnostic off by default

metrics: export zio runtime internals (scheduler, poller, DNS spill)

build: bump mimalloc v2.3.2 -> v3.3.2 (canary RSS round two)

deps: drop direct websocket dep, consume via zat

refactor: collapse src root to main.zig + internal/ (v0.0.2)

refactor: extract util/ and atproto/ packages from sprawling src root

notes?

fix: increase metrics buffer to 64 KiB — smaps/proc/disk metrics were truncated at 16 KiB