v0.16.1 — capture diagnostics and crash-safe recovery

v0.16.1 — capture diagnostics and crash-safe recovery

Reliability

• Audio-only capture now stops and finalizes on MediaProjection revocation,
  reports microphone routing/silence/start failures accurately, and checks each
  candidate source's actual recording state before use.
• Opus recordings use a private, versioned packet journal with one shared
  finalizer for normal stop and startup recovery. Interrupted recordings are
  recovered into their original MediaStore/file target, finalized atomically,
  and marked recovered — review before upload instead of being discarded or
  silently uploaded. Recovery is idempotent and preserves partial trailing data
  only up to the last complete packet.
• Unit suite: 190 passed, plus lintDebug and assembleRelease.

Notable changes per release of the Vezir Android thin client. Format
loosely follows Keep a Changelog.

Sideload-only. APKs are attached to each GitHub release. Same signing
keystore since v0.1.0; upgrades install in place.