build(deps): bump github.com/goceleris/celeris from 1.5.5 to 1.5.7 in /internal/integrationtest/testserver in the all-go-deps group

[dependabot]

Bumps the all-go-deps group in /internal/integrationtest/testserver with 1 update: github.com/goceleris/celeris.

Updates github.com/goceleris/celeris from 1.5.5 to 1.5.7

Release notes

Sourced from github.com/goceleris/celeris's releases.

celeris v1.5.7 — WebSocket broadcast: inline egress + wakeup coalesce (+43% loop engines)

Highlights — WebSocket/SSE broadcast throughput

The io_uring and epoll engines were turning an embarrassingly-parallel Hub broadcast into serial per-worker pipelines, capping fan-out ~2× below the std engine and Rust competitors. Two fixes close most of that gap:

• #404 — inline WS/SSE egress on the dispatch goroutine. The detached-connection send now happens inline on the dispatch goroutine (like net/http), parallelizing write(2) across all cores instead of funnelling every send through one loop/worker thread. io_uring uses a SINGLE_ISSUER-safe raw write gated on no in-flight ring send. +43.6% epoll, +43.2% io_uring on ws-hub-broadcast @​1024 conns (loop-thread CPU 50% → 0.3%).
• #403 — coalesce detach-queue wakeups. Write the wakeup eventfd only on the detach-queue empty→non-empty edge, collapsing the per-message wakeup-syscall storm under fan-out. +16.7% epoll, +18.6% io_uring.

Fixes (pre-existing, hardening)

• WS upgrade/close path: fixed an atomic.Value "store of inconsistently typed value" panic in the WS write-error path, plus two upgrade-vs-close data races — added an H1State.WSReady release/acquire barrier so closeConn never touches a half-wired connection. Surfaced only under -race+checkptr on peer-RST-mid-upgrade.

Dependencies

• #402 — bump middleware/compress deps (brotli, klauspost/compress).

Validated on the nightly matrix-validate gate (every refapp × engine, both archs, -race+checkptr, I-CONN leak invariants) — two full passes (1h + 2h) — plus targeted broadcast torture + goroutine-leak soak on both engines.

celeris v1.5.6 — bidirectional connection transplant (#383)

Highlights

• Bidirectional connection transplant (#383): established HTTP/1 keep-alive connections now migrate between the epoll and io_uring engines at clean request boundaries — both forward (epoll→io_uring on promote) and reverse (io_uring→epoll on demote), including async-dispatch connections.
• Fixes #396 (hollow promotion): the adaptive engine now actually captures io_uring's high-concurrency throughput instead of stranding established keep-alives on the standby epoll. At 1024 connections, adaptive reaches 99.96% of pure io_uring throughput (+15.5% over epoll) on the cluster — previously this win was forfeited.
• EPOLLRDHUP fd-leak fix in the epoll engine.

Validation

• Reverse + bidirectional-flap transplant verified under load on real io_uring hardware (-race, 16-core), with conns migrating cleanly in both directions and error rate within the 0.05% boundary budget.
• WebSocket + SSE (detached) and Postgres/Redis driver conformance green; detached conns are excluded from transplant by construction (migration only at fully-flushed request boundaries).

Full bench data (15 columns × scenarios, single-base64 HDR + per-process loadgen CPU restored): see the v1.5.6 docs publish.

Commits

• b1bdc43 Merge pull request #402 from goceleris/dependabot/go_modules/middleware/compr...
• 35a9c02 Merge pull request #404 from goceleris/perf/ws-inline-egress
• 42ad127 Merge pull request #403 from goceleris/perf/ws-broadcast-wakeup-coalesce
• ba3887a fix(websocket): close pre-existing upgrade-vs-close races + writeErr panic
• b487fc5 test(websocket): concurrent large-frame broadcast regression for inline egress
• 0af8831 perf(iouring): inline WS/SSE egress on the dispatch goroutine (SINGLE_ISSUER-...
• 68c87ba perf(epoll): inline WS/SSE egress on the dispatch goroutine
• 51ef82c perf(engine): coalesce detach-queue wakeups on WS broadcast fan-out
• 99e8ff1 deps: bump the all-go-deps group across 1 directory with 2 updates
• a8dddcc Merge pull request #398 from goceleris/fix/adaptive-1024-promote
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