chore(main): release 1.4.9

[sht-bot]

🤖 I have created a release beep boop

1.4.9 (2026-09-16)

Bug Fixes

• notifications: Recover from a dead listener connection (#11) (a1268b5)
• subscriptions: Keep catching up when the checkpoint timer fires (#10) (23cbf8e)

Miscellaneous

• ci: Automate releases with release-please (#7) (051c22d)
• ci: Restrict commit types to chore, feat and fix (#19) (fb651e2)
• Claim copyright for the work done in this fork (#8) (2dcb046)
• Clear shutdown noise and compiler warnings (#12) (01aea6a)
• Point self-referential links at this fork (#6) (44efa14)
• Support only the last three Elixir and OTP releases (#16) (9215862)
• Sync with upstream commanded/eventstore (f6a1fc6)
• Sync with upstream commanded/eventstore (3532706)
• test: Stop the test environment from hiding compiler warnings (#18) (549dbe0)

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[cursor]

PR Summary

Low Risk
The diff only updates version metadata and changelog; runtime risk comes from the already-merged notification and subscription fixes noted in the release notes.

Overview
Release 1.4.9 — bumps the package version from 1.4.8 to 1.4.9 in mix.exs and .github/release-please-manifest.json, and adds a 1.4.9 section to CHANGELOG.md (2026-09-16).

This is a release-please cut, not new feature code in the diff. The changelog records what consumers get in this tag: notifications recovery when the Postgres listener connection dies, and subscriptions continuing catch-up when the checkpoint timer fires, plus fork/CI housekeeping (release automation, Elixir/OTP support window, upstream sync, warning cleanup).

Reviewers can treat this PR as a version/changelog/manifest alignment check; validate the linked issues/commits if you need assurance on the runtime fixes.

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