alkhttp 0.1.0

HTTP interface for the alk stack: serves HTTP/1.1 + HTTP/2 on standard ALPNs (with WebSocket upgrade carrying the channels protocol) and hosts the HTTP-backed call-protocol adapters
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# Changelog

All notable changes to this crate are documented here. The format is
based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and
this crate adheres to [Semantic Versioning](https://semver.org/).

## [Unreleased]

### Changed

- **`alkcall` dependency bumped to 0.2** with the `gateway` feature
  enabled. The transport-neutral dispatch spine now comes from
  `alkcall::gateway` (promoted from this crate per alkcall ADR-048):
  `GatewayDispatch`, `schema_disclosure_denial`, and
  `DEFAULT_DEADLINE` are re-exported from `alkhttp::gateway`; the
  local copy (`gateway/dispatch.rs`) was deleted. The spine is used
  with the 30 s default deadline (identical behavior to the local
  version). alkcall 0.2 also carries the consumer-findings fixes
  CF-001..004 documented in
  `alkcall/docs/reviews/consumer-findings-ledger.md`.
- **`alkcall` dependency bumped to 0.4.1** (through 0.3, 0.4.0):
  - 0.3 — per-session fork, serving loop, and `op/register`
    (the WS op/register ACL surface in this crate builds on it);
    0.3.1 — `PeerCompositeEnv::peer_operations` so `list-peers`
    sees peer-announced ops (UP-03).
  - 0.4.0 — the registry enforces `input_schema` at call time
    (ADR-016 `INVALID_INPUT` leg); adapters no longer need to
    validate before dispatch.
  - 0.4.1 — early-arrival chunks are parked for un-adopted
    channels, closing the open/first-data race on the WS overlay.
- **`/publish` chunk validation uses the registry-owned validator**
  (CF-003). The local compile-once `PublishSchemaCache`
  (`gateway/schema_cache.rs`) is removed — `publish_schema` is
  compiled at **registration time** by alkcall and exposed as
  `OperationRegistry::publish_validator`; an un-compilable schema is
  now a registration error, so the fail-open window this cache closed
  GW-side cannot exist upstream either. The `/publish` chunk stream
  resolves against the registry's cached validator.
- The from_wss drop monitor and the WS overlay tests use
  `CallError::connection_closed` (CF-001), and the
  review-001-ws-eof-signal race tests now assert retryable
  `CONNECTION_CLOSED` on **both** resolution paths (the drop monitor
  and the undelivered-request write failure) — the previously
  tolerated non-retryable `INTERNAL: failed to write request frame`
  outcome on the race path is gone.

### Notes

- **CF-004 convergence:** the alkhttp-local `services/schema`
  defense-in-depth guard remains, but its shared check
  (`schema_disclosure_denial`) is now alkcall's promoted
  implementation (ADR-048); the alkhttp-local copy is gone. See
  ADR-071 for the updated disposition.