docs(quic+nestsClient): post-implementation status + audio-rooms completion plan

Two new module-local plan docs (per CLAUDE.md's "plans live in the owning
module" rule) and a sweep of stale inline phase references.

quic/plans/2026-04-26-quic-stack-status.md:
  Post-mortem of the original docs/plans/2026-04-22 plan. Documents
  what shipped vs what was estimated, the actual package layout (~8.5k
  LoC, 39 test files, 5 audit rounds), the crypto delegation surface
  (Quartz only — no BouncyCastle, no JNI), interop verification status
  (aioquic + picoquic; nests not yet), and known deferred items
  (STREAM retransmit, Initial-key discard, etc.).

nestsClient/plans/2026-04-26-audio-rooms-completion.md:
  Punch list to ship audio rooms end-to-end:
    M1 Listener wire-up in Amethyst UI
    M2 Multi-speaker audience UX
    M3 Foreground service for backgrounded playback
    M4 Manual interop pass against nostrnests.com
    M5 MoQ publisher path (ANNOUNCE / TrackPublisher)
    M6 Capture → encode → publish pipeline
    M7 NestsSpeaker API
    M8 App polish (reconnect, leave cleanup)
    M9 Foreground service for speakers
  ~6 weeks for full audio rooms; ~2 weeks for listener-only MVP.

Inline doc cleanup:
  * Removed "Phase 3a/3c-1/3c-2/3c-3" / "Phase B/C/D-K/L" references
    from active code; replaced with "today" or pointers to the
    completion plan
  * Removed "Kwik-based stub" references; QuicWebTransportFactory and
    surrounding docs now describe :quic as the production path
  * TlsClient header reflects non-null certificateValidator + the
    JdkCertificateValidator / PermissiveCertificateValidator split
  * SendBuffer header documents the best-effort no-retransmit mode
    explicitly (was hidden behind a "Phase L will fix this" note)
  * MoqMessage / MoqObject / MoqSession reflect listener-side as
    shipped + publisher-side as Phase M5

CLAUDE.md:
  * Module list now includes :quic and :nestsClient (was 5 modules,
    now 7)
  * Architecture diagram + sharing philosophy explain what each new
    module owns

No production behaviour changes; doc + comment-only edits. Tests green.

https://claude.ai/code/session_01EC1tfXfap8k8GyKvrxkxZx

nestsClient/src/jvmAndroid/kotlin/com/vitorpamplona/nestsclient/transport/QuicWebTransportFactory.kt

@@ -42,8 +42,10 @@ import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.flow
 
 /**
- * Pure-Kotlin WebTransport over QUIC v1, drop-in replacement for the
- * Kwik-based stub. This is the realisation of every layer in :quic.
+ * Pure-Kotlin WebTransport over QUIC v1, sitting on top of every layer in
+ * `:quic`. The historical alternative was a Kwik-based JNI binding; that
+ * was rejected because no Android-compatible native classifier ships, so
+ * we wrote `:quic` from scratch.
  *
  * Lifecycle on [connect]:
  *   1. Open a UDP socket connected to (authority host, authority port).