docs: re-key architecture docs off the alknet mono-repo — speak as alkcall

The ported docs still framed alknet siblings (alknet-core/-call/-channels/
-http/-tls/-client) as live load-bearing context of this crate. With the
extraction complete and alknet headed for glue-level replacement, the docs
now speak as alkcall and cite the real sibling crates (alkhttp, alktls,
alktty, alktunnels, alktrader).

- ADR-054 (new): re-own the verifier-selection rule in-crate — three
  remote roles (public X.509 endpoint / transport relay / hub),
  ServerCertVerifier by PeerEntry presence, RemoteIdentity None
  load-bearing. Provenance: alknet ADR-034 (never ported), demoted to
  footnote. Resolves OQ-21's cross-repo authority gap.
- OQ-43 (new, deferred(scope)): composition-layer ownership and shape
  after the alknet replacement — the named receiver for the
  downstream-side deferrals (OQ-33 endpoint layer, OQ-41 QUIC-native
  substrate, OQ-42 hub broker, OQ-19 persistence adapters, ADR-045 dial
  seam). README layering diagram redrawn with the composition layer as
  TBD-ownership instead of "alknet / alknode" in concrete.
- Spec docs reframed: titles, self-references, dial/TLS/from_jsonschema
  homes, malformed legacy cite rows removed; dead relative research
  paths qualified as source-repo paths.
- ADR amendments (append-only): 027 (alknet-http -> alkhttp), 031 (post-
  extraction state), 044 (split landed as modules in alkcall), 045
  (name normalization; citation-space note).
- Citation hygiene: unprefixed/colliding source-repo cites prefixed
  ("alknet ADR-NNN (provenance)") across 009/011/022/034/035/038/040/
  043/044/045; stale OQ cites corrected (session registries OQ-04, batch
  semantics OQ-03, verifier rule ADR-054); stale anchors fixed.
- README provenance note consolidated; citation conventions documented.

Verification: markdown link check (all local links resolve, all in-crate
ADR cites point at existing decisions/ files); table integrity check
(uniform row widths across open-questions.md and edited tables); residual
alknet-mention sweep (only provenance/historical/intentional framing
remains); architecture review subagent pass with zero remaining criticals.
Docs-only change — no code paths touched.

docs/architecture/channels-connection.md

@@ -1,6 +1,6 @@
 ---
 status: draft
-last_updated: 2026-07-18
+last_updated: 2026-10-13 (alkcall reframing)
 ---
 
 # channels-connection.md — ChannelBidiStreamSource and `BiStream` Access
@@ -21,7 +21,7 @@ tunnel uses the `BiStream` as raw bytes, call length-prefixes JSON, SSH
 runs its own channel protocol.
 
 The `BiStream` is wrapped in a `ChannelBidiStreamSource` that implements
-`alknet-core`'s `BidiStreamSource` trait (ADR-008), and a `Connection` is
+alkcall's vendored-core `BidiStreamSource` trait (ADR-008), and a `Connection` is
 constructed from it via `Connection::from_source(source, alpn)`. The
 handler receives a `Connection`, calls `accept_bi()` once (yield-once per
 channel), gets a `BiStream`, and drives its session — identical to how it
@@ -30,7 +30,7 @@ works on a top-level QUIC connection.
 ## `ChannelBidiStreamSource`
 
 ```rust
-// In alknet-channels:
+// In alkcall (channels subsystem):
 
 pub struct ChannelBidiStreamSource {
     // The reassembly buffer for this channel's payload bytes (one per
@@ -86,7 +86,7 @@ async fn handle(&self, connection: Connection, _auth: &AuthContext)
     let (mut tcp_read, mut tcp_write) = tcp.into_split();
     let (mut recv, mut send) = tokio::io::split(&mut bidi);
 
-    // Two-pump with shutdown-on-completion (ADR-078)
+    // Two-pump with shutdown-on-completion (ADR-050)
     let c2t = async {
         tokio::io::copy(&mut recv, &mut tcp_write).await?;
         tcp_write.shutdown().await.ok();
@@ -171,9 +171,11 @@ All design decisions are documented as ADRs in [decisions/](decisions/).
 - ADR-008: BidiStreamSource trait
 - ADR-009: `BiStream` as the handler leaf
 - ADR-007: `Connection::from_stream` (the yield-once path generalized)
-- ADR-077: TTY inside channels (TTY always uses its 5-byte format,
+- Provenance (source-repo, not ported): [alknet ADR-077](/workspace/@alkdev/alknet/docs/architecture/decisions/077-tty-inside-channels.md) — TTY inside channels (TTY always uses its 5-byte format,
   carried transparently in the channels payload)
-- `docs/research/alknet-channels/poc-summary.md` §POC Target 2 (the
-  yield-once `Connection::from_stream` validation)
-- `docs/research/stream-unification/findings.md` — the research that
+- Source-repo POC research (alknet provenance):
+  `/workspace/@alkdev/alknet/docs/research/alknet-channels/poc-summary.md`
+  §POC Target 2 (the
+  yield-once `Connection::from_stream` validation);
+  `/workspace/@alkdev/alknet/docs/research/stream-unification/findings.md` — the research that
   surfaced the single-accessor resolution