v0.10.1 — awaiting_reply on the index

v0.10.1 — awaiting_reply on the index

Closes the one degradation v0.10.0's notes disclosed, the same day it was filed
(#192), plus two structural test fixes from a fresh full-device pass.

Fixed

• mail_awaiting_reply now reads the Envelope Index at rest (#192, #196).
  Mail stores the References graph itself (message_references), so "which of my
  sent messages has no reply?" is one SQL join instead of ~500 Apple Events against
  the unified All Sent. Device-measured on a 13k-message store: 0.9s where the
  AppleScript scan measured 209s on idle Mail and blew a 600s budget on busy Mail.
  It also works with Mail not running, and a reply draft can no longer clear a
  send prematurely (the citing message must sit in an inbox). The AppleScript scan
  survives as the fallback for machines without Full Disk Access.
• New SENT_SUFFIXES in the one mailbox-url table: Sent, Sent Messages,
  Sent Mail, Sent Items — leaf-anchored, same discipline as the Trash spellings.

Test honesty (full-device pass, 2026-08-23)

• The integration scratch mailbox now prefers a true-IMAP account,
  deterministically: Gmail label copies were device-observed resurrecting after
  both a verified trash and a verified unlabel, so move/undo verification on a
  Gmail mailbox is structurally unreliable (#198).
• create_mailbox's device test asserts the synthesized address resolves
  rather than demanding an empty mailbox the fixture itself documents as reused
  (#198).
• Music: play against a cold-launched, queue-less Music lands in paused —
  device-observed, now accepted (#197).

Verified

Full integration suite on device (72/78 first pass, every failure triaged to a
fixed test or a settled-Mail retry — no product defects), outbound re-verified
live post-deploy (send → outbox drain → delivered copy read back; reply threading
confirmed in the index References graph; #133 autosave litter caught and swept),
and the deploy proven by doctor().build.