Baixar agent-team-mail 1.3.1 per a Windows

Release Notes

Summary
- version: 1.3.1
- release date: 2026-07-15
- release owner: publisher (ATM release execution)
This release lands Phase AE (installed-copy packaging, docs/help surfacing,
publisher freshness gate) and Phase AF (host-wide singleton closure,
observability/release gates, native send input-integrity hardening), plus a
1.3.1 cross-host smoke-test validation sprint and a Homebrew tap
platform-asset mapping fix.

Included Changes

Phase AF — reliability hardening (PR #539 integrate/phase-AF → develop)
- Close the host-wide singleton bypass that blocked the 1.3.0 release
(Sprint AF.1).
- Add observability and release-gate hardening: structured tracing fields,
request-ID sentinel-collision fix, release-preflight freshness checks
(Sprint AF.2).
- Harden native atm send input-integrity handling (Sprint AF.3).
- Remove the workflow-sidecar (superseded by daemon-native dispatch,
reclassified from Sprint AF.4 to Sprint AD.36).

Phase AE — installed-copy packaging & docs (PR #530 integrate/phase-AE → develop)
- Ship an installed-copy packaging path and publisher freshness gate
(Sprints AE.1, AE.8).
- Land hooks/nudge template corpus and mailbox/diagnostics corpus expansion
(Sprints AE.3, AE.4).
- Surface CLI help content and verify the installed user-doc graph
end-to-end (Sprints AE.6, AE.7, AE.9).

1.3.1 cross-host smoke-test validation (PR #540)
- Independently re-run and verify the full macOS and Windows smoke suites
against the 1.3.1 candidate (fast/normal/thorough/shared-host/graft-
same-host lanes) with evidence SHAs verified as real ancestors of the
reviewed commit.
- Formally document the true cross-host (Windows↔macOS simultaneous)
coverage gap as deferred (AB-SMOKE-001–010, still pending) rather than
silently glossing over it.

Homebrew formula fix (PR #529, issue #522)
- Fix the update-homebrew formula generator's platform-asset mapping bug
that caused all three platform url/sha256 blocks to point at the same
aarch64-apple-darwin asset.
- Backfill the 1.3.0 and 1.2.3 tap formulas with corrected per-platform
assets using the fixed generator.

Other fixes carried into this release
- winget token wiring fix (PR #532).
- Preflight documentation pass (PR #531).
- atm send/SendMessage-to-atm-send audit and correction (PR #534).

Operator / User Impact
- No breaking CLI changes. atm continues to operate as documented in 1.3.0.
- Installations using the daemon/plugin host benefit from the host-wide
singleton fix (prevents duplicate daemon instances race-starting on a
single host) and observability improvements.
- Homebrew tap users on 1.3.0/1.2.3 who hit a platform-asset mismatch
(wrong sha256/url for non-macOS-arm64 platforms) get corrected formulas
as part of this release's tap backfill.
- True cross-host (Windows↔macOS simultaneous) messaging remains
same-host-validated only; the cross-host matrix is tracked as pending,
not yet executed.

Packaging / Distribution Notes
- crates.io: publish in dependency order per the release manifest (9
publishable crates): atm-storage → agent-team-mail-core →
atm-storage-rusqlite → atm-daemon-client → atm-runtime →
atm-daemon-bootstrap → atm-daemon → atm-graft → agent-team-mail.
- GitHub Releases: tag v1.3.1 cut from main via the Release workflow.
- Homebrew: regenerate agent-team-mail.rb and atm.rb at 1.3.1 with the
fixed generator; backfill 1.3.0 and 1.2.3 formulas with corrected
per-platform url/sha256.
- winget: token wiring fix included (PR #532); manifest publish follows
standard release workflow.

Known Issues / Waivers
- True cross-host (Windows↔macOS simultaneous) smoke coverage
(AB-SMOKE-001–010) remains PENDING; only same-host validation was run
for this release.

Follow-Up
- Execute the frozen cross-host smoke matrix
(docs/plans/phase-AB/cross-host-smoke-checklist.md) in a future
release window.
- File the non-blocking flaky-test hardening follow-up for
mailbox_locking.rs:606-621 (tracked, not yet filed as of this release).