v0.7.0

Companion release to aiortp 0.7.0. No breaking changes from 0.6.0.

• Adaptive playout passthrough: CallSession exposes playout /
  playout_max_delay_ms, riding through to aiortp.RTPSession.create. In
  playout mode the receive side delivers audio on a steady clock with a
  jitter-tracking buffer depth — the inbound defense for jittery links such as
  WiFi callers and congested paths. jitter_prefetch only applies when
  playout is off.
• TX redundancy passthrough: duplicate_tx rides the same CallSession
  surface as plc / cn / playout, for degraded links.
• The rtp extra requires aiortp >= 0.7.0, which brings the playout
  wire-clock fix for RFC 3551 G.722 senders alongside duplicate_tx.

Published retroactively on 2026-07-30: this release was tagged and shipped to
PyPI on 2026-06-11, but its notes were never written. Reconstructed from the
commits — see CHANGELOG.md.